Practice TEST 2. Explain your reasoning


 Kerrie Jackson
 4 years ago
 Views:
Transcription
1 Practice TEST 2 1. Imagine taking an elevator ride from the1 st floor to the 10 th floor of a building. While moving between the 1 st and 2 nd floors the elevator speeds up, but then moves at a constant speed between the 2 nd and 9 th floors. Which one of the following statements about the elevator best describes the forces acting on it, as it moves upward at a constant speed? (Assume any frictional forces can be neglected.) Circle your choice. a) The upward pull of the cable is stronger than the downward gravitational pull of the Earth. b) The upward pull of the cable is equal in strength to the downward gravitational pull of the Earth. c) The upward pull of the cable is weaker than the downward gravitational pull of the Earth. Explain your reasoning When an object moves at a constant speed the forces acting on it must be balanced. In this case the only two forces involved are the downward gravitational pull of the Earth and the upward pull of the cable. For the forces to be balanced these two must be equal in strength. (If one of the forces was stronger than the other, the forces would be unbalanced and the speed of the elevator would be changing.) 2. As the elevator in the previous question passes the 9 th floor it begins to slow down (still moving upward), before stopping at the 10 th floor. As the elevator is slowing down, which one of the following statements best describes the forces acting on it? (Again, assume any frictional forces can be neglected.) Circle your choice. d) The upward pull of the cable is stronger than the downward gravitational pull of the Earth. e) The upward pull of the cable is equal in strength to the downward gravitational pull of the Earth f) The upward pull of the cable is weaker than the downward gravitational pull of the Earth. Explain your reasoning In order for an object to slow down, the force acting in the opposite direction to the motion must be stronger than any force acting in the same direction as the motion. Since the elevator is slowing down as it moves upward, this means the downward force must be stronger than the
2 upward force. The only way for this to happen is if the upward pull of the cable is weaker than the downward gravitational pull of the Earth. 3. Consider two different carts that are designed to move along a surface with essentially no friction. Cart A is has more mass than cart B. A student performs two experiments with these carts. In the first experiment she mounts identical fans (with same number of batteries) on each of the two carts and puts the carts on separate tracks. She turns both fans on and lets the carts start moving at the same time. To the right is a force diagram (with motion arrow) for cart B one second after the carts begin moving: Consider cart A (the more massive one). Suppose you wanted to draw a force diagram for cart A at the same time (one second after starting), including both a force arrow and a speed arrow: g) Which of the following arrows could best represent the length of the force arrow on cart A. Circle your choice and briefly justify why you made that choice. Since the two fans are identical (with the same number of batteries), they will push with equal force strengths. Therefore the force arrow on both carts should be the same length. h) Which of the following arrows could best represent the length of the speed arrow for cart A. Circle your choice and briefly justify why you made that choice.
3 Cart A has more mass than Cart B, but it has the same strength force acting on it. Therefore Cart A will speed up at a slower rate than Cart B, and so at 1 second after starting it will be moving more slowly than Cart B. This slower speed would be represented by a shorter speed arrow. 4. An archer uses a bow to shoot an arrow straight up into the air on a still, calm day. The arrow rises to a certain height and then falls straight back down, sticking in the ground. The speed time graph for the arrow shown below is for the period starting just after it leaves the bow to just before it sticks in the ground. i) At what time does the arrow reach its highest point? Briefly justify how you know. The arrow reaches its highest point at 5 seconds. We can tell this from the graph because it is at this time that it stops slowing down as it rises, stops for an instant at its highest point, and then begins to speed up again as it falls. j) Indicate on the graph the entire region during which the gravitational potential energy of the arrow+earth system was increasing. Briefly justify how you know. The gravitational potential energy in the system was increasing while the arrow was slowing down on its way upward. Since the arrow was slowing down, the kinetic energy in the system was decreasing. Therefore, we know from our ideas of energy conservation that the potential energy must be increasing to compensate for this. k) During the entire time that the arrow was in flight (up and down) what was happening to the total energy (kinetic + gravitational potential) of the arrow+earth system. Was it increasing, decreasing, or staying constant? How do you know?
4 Since energy cannot be created or destroyed, and assuming there is no energy input or output to the arrow+earth system, then the total energy in the system stayed constant. Any changes in kinetic energy were exactly compensated for by equal and opposite changes in gravitational potential energy. In the remainder of this problem you will explain why the arrow slows down after it leaves the bow and until it reaches its highest point. You will first explain it in terms of energy ideas, and then will explain it again in terms of force ideas. In both cases, ignore the effects of air resistance. Explanation in terms of energy ideas: Why does the arrow slow down as it rises? Draw an I/O energy diagram for the arrow+earth system as the arrow is rising. Earth And Arrow Decrease in kinetic energy Increase in gravitational potential energy Write a few sentences to explain (in energy terms) why the arrow slows down as it rises. After the arrow leaves the bow, the only interaction it is involved in as it moves upward is the gravitational interaction with arrow and the Earth. As the arrow rises it gets further from the Earth and so the gravitational potential energy in the arrow+earth system increases. Because there is no energy input to, or output from, this system, the Law of Conservation of Energy tells us that this increase in gravitational potential energy must be compensated for by a decrease in the kinetic energy of the objects in the system. Thus, since the kinetic energy of the arrow decreases as it rises, this means it slows down.
5 Explanation in terms of force ideas: Why does the arrow slow down as it rises? Complete the force diagram for this interaction: (Draw both force and motion arrows. Label the force arrow.) Direction of motion Gravitational force of the Earth Write a few sentences to explain (in force terms) why the arrow slows down as it rises. 5. The gravitational force of the Earth acts downward on the arrow. As the arrow rises, this force is acting in the opposite direction to its motion. When a force acts in the opposite direction to the motion of an object, its speed decreases. Therefore, the speed of the arrow decreases as it rises. Fill the blanks in the system
6 MULTIPLE CHOICE QUESTIONS 1) How many different elements are in a water molecule? A) one B) two C) three D) four E) none 2) An atomic mass unit (amu) is 1/12 the mass of A) an electron. B) a proton. C) a hydrogen atom. D) a carbon atom. E) a uranium atom. Answer: D 3) Which of the following statements is true?
7 A) An atom is the smallest particle known to exist. B) There are only about 100 different kinds of atoms that combine to form all substances. C) There are thousands of different kinds of atoms that account for a wide variety of substances. D) A large atom can be photographed with the aid of an ordinary microscope. E) None of these statements are true. 4) Which of the following is not a mixture? A) granite B) cake C) air D) beach sand E) None. All of the above choices are mixtures. Answer: E 5) Solid matter is mostly empty space. The reason solids don't fall through one another is because A) atoms are constantly vibrating, even at absolute zero. B) of nuclear forces. C) of gravitational forces. D) of electrical forces. Answer: D 6) Compared to the energy it takes to separate oxygen and hydrogen from water, the amount of energy given off when they recombine is A) slightly more. B) slightly less. C) much more. D) much less. E) the same. Answer: E 7) Compared to the atoms that make up the body of an elderly person, the atoms that make up the body of a newborn baby are A) newer. B) actually older. C) the same age. 8) The chemical properties of matter come mostly from its A) protons. B) electrons. C) neutrons.
8 9) If a gram of antimatter meets a kilogram of matter, the amount of mass to survive is A) 1 gram. B) 999 grams. C) 1 kilogram. D) 1.1 kilogram. 10) If two protons are added to an oxygen nucleus, the result is A) heavy oxygen. B) fluorine. C) neon. D) sodium. E) nitrogen. 11) Which of these atoms has the greatest amount of electrical charge in its nucleus? A) helium B) carbon C) iron D) gold E) uranium Answer: E 12) Which of these atoms has the greatest number of electrons? A) helium B) carbon C) iron D) gold E) uranium Answer: E 13) Two objects have the same size and shape, but one is much heavier than the other. When they are dropped simultaneously from a tower, they reach the ground at the same time, but the heavier one has a greater A) speed. B) acceleration. C) momentum. D) all of these 14) To catch a ball, a baseball player extends the hand forward before impact with the ball and then lets it ride backward in the direction of the ball's motion. Doing this reduces the force of impact on the player's hand principally because the A) force of impact is reduced. B) relative velocity is less.
9 C) time of impact is increased. D) time of impact is decreased. 15) When you are in the way of a fastmoving object and can't get out of its way, you will suffer a smaller force of impact if you decrease its momentum over a A) long time. B) short time. C) same way either way 16) A bullet is fired from a gun. The speed of the bullet will be about the same as the speed of the recoiling gun A) because momentum is conserved. B) because velocity is conserved. C) because both velocity and momentum are conserved. D) if the mass of the bullet equals the mass of the gun. Answer: D 17) The force on an apple hitting the ground depends upon A) the speed of the apple just before it hits. B) the time of impact with the ground. C) whether or not the apple bounces. D) all of these Answer: D 18) If a monkey floating in outer space throws his hat away, the hat and the monkey will both A) move away from each other, but at different speeds. B) move away from each other at the same speed. C) move a short distance and then slow down. D) move a short distance and then go faster. E) come to a stop after a few minutes. 19) A sandbag is motionless in outer space. A second sandbag with 3 times the mass moving at 12 m/s collides with it. They stick together and move at a speed of A) 3 m/s. B) 4 m/s. C) 6 m/s. D) 8 m/s. Answer: E 20) An object may have potential energy because of its
10 A) speed. B) acceleration. C) momentum. D) location. Answer: D 21) A bow is drawn so that it has 40 J of potential energy. When fired, the arrow will ideally have a kinetic energy that is A) less than 40 J. B) more than 40 J. C) 40 J. D) impossible to predict without additional information 22) It takes 40 J to push a large box 4 m across a floor. Assuming the push is in the same direction as the move, what is the magnitude of the force on the box? A) 4 N B) 10 N C) 40 N D) 160 N 23) Using 1000 J of work, a toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed to do this job was A) 20 W. B) 50 W. C) 100 W. D) 1000 W. E) 20,000 W. 24) An object at rest may also have A) speed. B) velocity. C) momentum. D) kinetic energy. E) potential energy. Answer: E 25) Two pool balls, each moving at 2 m/s, roll toward each other and collide. Suppose after bouncing apart, each moves at 4 m/s. This collision violates conservation of A) momentum. B) energy. C) both momentum and energy.
11 D) none of the above choices 26) If several balls are thrown straight up with varying initial velocities, the quantity that will have the same value for each trial is the ball's A) initial momentum. B) maximum height. C) time of travel. D) acceleration. E) None of the above choices are correct. Answer: D 27) The rotational inertia of your leg is greater when your leg is A) straight. B) bent. C) same either way 28) On a balanced seesaw, a boy three times as heavy as his partner sits A) 1/3 the distance from the fulcrum. B) less than 1/3 the distance from the fulcrum. C) more than 1/3 the distance from the fulcrum. 29) Two people are balanced on a seesaw. If one person leans toward the center of the seesaw, that person's end of the seesaw will A) rise. B) fall. C) stay at the same level. D) rise and then fall. E) fall and then rise. 30) A ball rolls down a hill mainly because of A) an unbalanced torque. B) a balanced torque. C) its rotational inertia. D) its angular acceleration. E) its angular momentum. 31) Suppose you are at the center of a large freelyrotating horizontal turntable in a carnival funhouse. As you crawl toward the edge, the angular momentum of you and the turntable A) decreases. B) increases. C) remains the same, but the RPMs decrease.
12 D) decreases in direct proportion to your decrease in RPMs. 32) Stand a meterstick on its end and let go and it rotates to the floor. If you attach a heavy weight to its upper end and repeat, falling time will be A) more. B) less. C) the same. 33) A boy plays solitary seesaw by placing a long plank over a small rock and sitting at one end of the plank. When the seesaw is balanced, the boy's mass is most likely A) greater than the mass of the seesaw. B) less than the mass of the seesaw. C) equal or very nearly equal to the mass of the seesaw. D) Not enough information is given. 34) An asteroid exerts a 360N gravitational force on a nearby spacecraft. If the spacecraft moves to a position three times as far from the center of the asteroid, the force will be A) zero. B) 40 N. C) 120 N. D) 360 N. E) 1080 N. 35) Inside a freely falling elevator, there would be no A) gravitational force on you. B) apparent weight for you. C) both of these D) none of these 36) No force due to Earth's gravity is acting on the astronauts inside the orbiting space shuttle. This statement is A) always true while in orbit. B) sometimes true while in orbit. C) always false. 37) From Earth, one satellite appears to overtake another. The faster satellite is A) higher. B) lower. C) smaller.
13 D) can't say 38) Acceleration is greater for a satellite when it is at the A) apogee. B) perigee. C) zenith. D) same acceleration at all of the above places. 39) Angular momentum is greater for a satellite when it is at the A) apogee. B) perigee. C) same at apogee and perigee 40) The period of a satellite, the time it takes for a complete revolution, depends on the satellite's A) mass. B) weight. C) radial distance. D) all of these 41) Minimal orbital speed about the Earth is about 8 km/s. Minimal orbital speed about the moon would be A) less than 8 km/s. B) more than 8 km/s. C) about 8 km/s. 42) The speeds of the planets about the sun depend on A) their distances from the sun. B) the masses of the planets. C) their periods of rotation. D) None of the above are correct. 43) According to Newton, doubling the distance between two interacting objects A) divides by 2 the gravitational force between them. B) multiplies by 2 the gravitational force between them. C) divides by 4 the gravitational force between them. D) multiplies by 4 the gravitational force between them. 44) The concept of force is not fundamental to
14 A) Newton's theory of gravitation. B) Einstein's theory of gravitation. C) both of these D) neither of these 45) An asteroid exerts a 360N gravitational force on a nearby spacecraft. If the spacecraft moves to a position three times as far from the center of the asteroid, the force will be A) zero. B) 40 N. C) 120 N. D) 360 N. E) 1080 N. 46) If the radius of the Earth somehow decreased with no change in mass, your weight would A) increase. B) not change. C) decrease.
Q3.2.a The gravitational force exerted by a planet on one of its moons is 3e23 newtons when the moon is at a particular location.
Q3.2.a The gravitational force exerted by a planet on one of its moons is 3e23 newtons when the moon is at a particular location. If the mass of the moon were three times as large, what would the force
More informationPHYS 117 Exam I. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
PHYS 117 Exam I Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Car A travels from milepost 343 to milepost 349 in 5 minutes. Car B travels
More information4 Gravity: A Force of Attraction
CHAPTER 1 SECTION Matter in Motion 4 Gravity: A Force of Attraction BEFORE YOU READ After you read this section, you should be able to answer these questions: What is gravity? How are weight and mass different?
More informationChapter 7: Momentum and Impulse
Chapter 7: Momentum and Impulse 1. When a baseball bat hits the ball, the impulse delivered to the ball is increased by A. follow through on the swing. B. rapidly stopping the bat after impact. C. letting
More informationName Class Date. true
Exercises 131 The Falling Apple (page 233) 1 Describe the legend of Newton s discovery that gravity extends throughout the universe According to legend, Newton saw an apple fall from a tree and realized
More information1. Mass, Force and Gravity
STE Physics Intro Name 1. Mass, Force and Gravity Before attempting to understand force, we need to look at mass and acceleration. a) What does mass measure? The quantity of matter(atoms) b) What is the
More informationReview Chapters 2, 3, 4, 5
Review Chapters 2, 3, 4, 5 4) The gain in speed each second for a freelyfalling object is about A) 0. B) 5 m/s. C) 10 m/s. D) 20 m/s. E) depends on the initial speed 9) Whirl a rock at the end of a string
More informationPhysics 2A, Sec B00: Mechanics  Winter 2011 Instructor: B. Grinstein Final Exam
Physics 2A, Sec B00: Mechanics  Winter 2011 Instructor: B. Grinstein Final Exam INSTRUCTIONS: Use a pencil #2 to fill your scantron. Write your code number and bubble it in under "EXAM NUMBER;" an entry
More informationTennessee State University
Tennessee State University Dept. of Physics & Mathematics PHYS 2010 CF SU 2009 Name 30% Time is 2 hours. Cheating will give you an Fgrade. Other instructions will be given in the Hall. MULTIPLE CHOICE.
More informationFriction and Gravity. Friction. Section 2. The Causes of Friction
Section 2 Friction and Gravity What happens when you jump on a sled on the side of a snowcovered hill? Without actually doing this, you can predict that the sled will slide down the hill. Now think about
More informationConceptual Questions: Forces and Newton s Laws
Conceptual Questions: Forces and Newton s Laws 1. An object can have motion only if a net force acts on it. his statement is a. true b. false 2. And the reason for this (refer to previous question) is
More informationChapter 4: Newton s Laws: Explaining Motion
Chapter 4: Newton s Laws: Explaining Motion 1. All except one of the following require the application of a net force. Which one is the exception? A. to change an object from a state of rest to a state
More informationB) 286 m C) 325 m D) 367 m Answer: B
Practice Midterm 1 1) When a parachutist jumps from an airplane, he eventually reaches a constant speed, called the terminal velocity. This means that A) the acceleration is equal to g. B) the force of
More informationIII. Applications of Force and Motion Concepts. Concept Review. Conflicting Contentions. 1. Airplane Drop 2. Moving Ball Toss 3. Galileo s Argument
III. Applications of Force and Motion Concepts Concept Review Conflicting Contentions 1. Airplane Drop 2. Moving Ball Toss 3. Galileo s Argument Qualitative Reasoning 1. Dropping Balls 2. Spinning Bug
More informationNEWTON S LAWS OF MOTION
Name Period Date NEWTON S LAWS OF MOTION If I am anything, which I highly doubt, I have made myself so by hard work. Isaac Newton Goals: 1. Students will use conceptual and mathematical models to predict
More informationPhysics: Principles and Applications, 6e Giancoli Chapter 4 Dynamics: Newton's Laws of Motion
Physics: Principles and Applications, 6e Giancoli Chapter 4 Dynamics: Newton's Laws of Motion Conceptual Questions 1) Which of Newton's laws best explains why motorists should buckleup? A) the first law
More information9. The kinetic energy of the moving object is (1) 5 J (3) 15 J (2) 10 J (4) 50 J
1. If the kinetic energy of an object is 16 joules when its speed is 4.0 meters per second, then the mass of the objects is (1) 0.5 kg (3) 8.0 kg (2) 2.0 kg (4) 19.6 kg Base your answers to questions 9
More informationExam Three Momentum Concept Questions
Exam Three Momentum Concept Questions Isolated Systems 4. A car accelerates from rest. In doing so the absolute value of the car's momentum changes by a certain amount and that of the Earth changes by:
More informationPhysics 11 Assignment KEY Dynamics Chapters 4 & 5
Physics Assignment KEY Dynamics Chapters 4 & 5 ote: for all dynamics problemsolving questions, draw appropriate free body diagrams and use the aforementioned problemsolving method.. Define the following
More information1. The Kinetic Theory of Matter states that all matter is composed of atoms and molecules that are in a constant state of constant random motion
Physical Science Period: Name: ANSWER KEY Date: Practice Test for Unit 3: Ch. 3, and some of 15 and 16: Kinetic Theory of Matter, States of matter, and and thermodynamics, and gas laws. 1. The Kinetic
More informationACTIVITY 6: Falling Objects
UNIT FM Developing Ideas ACTIVITY 6: Falling Objects Purpose and Key Question You developed your ideas about how the motion of an object is related to the forces acting on it using objects that move horizontally.
More informationForces. Definition Friction Falling Objects Projectiles Newton s Laws of Motion Momentum Universal Forces Fluid Pressure Hydraulics Buoyancy
Forces Definition Friction Falling Objects Projectiles Newton s Laws of Motion Momentum Universal Forces Fluid Pressure Hydraulics Buoyancy Definition of Force Force = a push or pull that causes a change
More informationPractice final for Basic Physics spring 2005 answers on the last page Name: Date:
Practice final for Basic Physics spring 2005 answers on the last page Name: Date: 1. A 12 ohm resistor and a 24 ohm resistor are connected in series in a circuit with a 6.0 volt battery. Assuming negligible
More informationNewton s Laws of Motion
Newton s Laws of Motion The Earth revolves around the sun in an elliptical orbit. The moon orbits the Earth in the same way. But what keeps the Earth and the moon in orbit? Why don t they just fly off
More informationNewton s Law of Universal Gravitation
Newton s Law of Universal Gravitation The greatest moments in science are when two phenomena that were considered completely separate suddenly are seen as just two different versions of the same thing.
More informationUse the following information to deduce that the gravitational field strength at the surface of the Earth is approximately 10 N kg 1.
IB PHYSICS: Gravitational Forces Review 1. This question is about gravitation and ocean tides. (b) State Newton s law of universal gravitation. Use the following information to deduce that the gravitational
More informationWork, Energy & Momentum Homework Packet Worksheet 1: This is a lot of work!
Work, Energy & Momentum Homework Packet Worksheet 1: This is a lot of work! 1. A student holds her 1.5kg psychology textbook out of a second floor classroom window until her arm is tired; then she releases
More informationPS6.2 Explain the factors that determine potential and kinetic energy and the transformation of one to the other.
PS6.1 Explain how the law of conservation of energy applies to the transformation of various forms of energy (including mechanical energy, electrical energy, chemical energy, light energy, sound energy,
More informationName Class Period. F = G m 1 m 2 d 2. G =6.67 x 1011 Nm 2 /kg 2
Gravitational Forces 13.1 Newton s Law of Universal Gravity Newton discovered that gravity is universal. Everything pulls on everything else in the universe in a way that involves only mass and distance.
More information8. As a cart travels around a horizontal circular track, the cart must undergo a change in (1) velocity (3) speed (2) inertia (4) weight
1. What is the average speed of an object that travels 6.00 meters north in 2.00 seconds and then travels 3.00 meters east in 1.00 second? 9.00 m/s 3.00 m/s 0.333 m/s 4.24 m/s 2. What is the distance traveled
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Vector A has length 4 units and directed to the north. Vector B has length 9 units and is directed
More informationPHY231 Section 2, Form A March 22, 2012. 1. Which one of the following statements concerning kinetic energy is true?
1. Which one of the following statements concerning kinetic energy is true? A) Kinetic energy can be measured in watts. B) Kinetic energy is always equal to the potential energy. C) Kinetic energy is always
More informationCHAPTER 6 WORK AND ENERGY
CHAPTER 6 WORK AND ENERGY CONCEPTUAL QUESTIONS. REASONING AND SOLUTION The work done by F in moving the box through a displacement s is W = ( F cos 0 ) s= Fs. The work done by F is W = ( F cos θ). s From
More informationName: Date: Period: Gravity Study Guide
Vocabulary: Define the following terms. Law of Universal Gravitation Gravity Study Guide Weight Weightlessness Gravitational Field Black hole Escape velocity Math: Be able to use the equation for the law
More informationChapter 3 Falling Objects and Projectile Motion
Chapter 3 Falling Objects and Projectile Motion Gravity influences motion in a particular way. How does a dropped object behave?!does the object accelerate, or is the speed constant?!do two objects behave
More informationAP Physics C Fall Final Web Review
Name: Class: _ Date: _ AP Physics C Fall Final Web Review Multiple Choice Identify the choice that best completes the statement or answers the question. 1. On a position versus time graph, the slope of
More informationch 15 practice test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
ch 15 practice test Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Work is a transfer of a. energy. c. mass. b. force. d. motion. 2. What
More informationPhysics 125 Practice Exam #3 Chapters 67 Professor Siegel
Physics 125 Practice Exam #3 Chapters 67 Professor Siegel Name: Lab Day: 1. A concrete block is pulled 7.0 m across a frictionless surface by means of a rope. The tension in the rope is 40 N; and the
More informationPHYS 211 FINAL FALL 2004 Form A
1. Two boys with masses of 40 kg and 60 kg are holding onto either end of a 10 m long massless pole which is initially at rest and floating in still water. They pull themselves along the pole toward each
More informationAristotelian Physics. Aristotle's physics agrees with most people's common sense, but modern scientists discard it. So what went wrong?
Aristotelian Physics Aristotle's physics agrees with most people's common sense, but modern scientists discard it. So what went wrong? Here's what Aristotle said: Aristotelian Physics Aristotle s classification
More informationNewton s Laws. Newton s Imaginary Cannon. Michael Fowler Physics 142E Lec 6 Jan 22, 2009
Newton s Laws Michael Fowler Physics 142E Lec 6 Jan 22, 2009 Newton s Imaginary Cannon Newton was familiar with Galileo s analysis of projectile motion, and decided to take it one step further. He imagined
More informationChapter 3.8 & 6 Solutions
Chapter 3.8 & 6 Solutions P3.37. Prepare: We are asked to find period, speed and acceleration. Period and frequency are inverses according to Equation 3.26. To find speed we need to know the distance traveled
More informationPhysics: Principles and Applications, 6e Giancoli Chapter 2 Describing Motion: Kinematics in One Dimension
Physics: Principles and Applications, 6e Giancoli Chapter 2 Describing Motion: Kinematics in One Dimension Conceptual Questions 1) Suppose that an object travels from one point in space to another. Make
More informationcircular motion & gravitation physics 111N
circular motion & gravitation physics 111N uniform circular motion an object moving around a circle at a constant rate must have an acceleration always perpendicular to the velocity (else the speed would
More informationAt the skate park on the ramp
At the skate park on the ramp 1 On the ramp When a cart rolls down a ramp, it begins at rest, but starts moving downward upon release covers more distance each second When a cart rolls up a ramp, it rises
More informationWhy don t planets crash into each other?
1 Just as we know that the sun will rise every morning, we expect the planets and the moon to stay in their orbits. And rightly so. For 400 years, people have understood that the movements of Earth, the
More informationFree Fall: Observing and Analyzing the Free Fall Motion of a Bouncing PingPong Ball and Calculating the Free Fall Acceleration (Teacher s Guide)
Free Fall: Observing and Analyzing the Free Fall Motion of a Bouncing PingPong Ball and Calculating the Free Fall Acceleration (Teacher s Guide) 2012 WARD S Science v.11/12 OVERVIEW Students will measure
More informationPhysics Section 3.2 Free Fall
Physics Section 3.2 Free Fall Aristotle Aristotle taught that the substances making up the Earth were different from the substance making up the heavens. He also taught that dynamics (the branch of physics
More informationPHY231 Section 1, Form B March 22, 2012
1. A car enters a horizontal, curved roadbed of radius 50 m. The coefficient of static friction between the tires and the roadbed is 0.20. What is the maximum speed with which the car can safely negotiate
More information1. Large ships are often helped into port by using two tug boats one either side of the ship. April 5, 1989 (Anchorage Daily News / Erik Hill)
1. Velocity and displacement vectors and scalars Vector and scalar quantities: force, speed, velocity, distance, displacement, acceleration, mass, time and energy. Calculation of the resultant of two vector
More informationThe University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PHYSICAL SETTING PHYSICS. Friday, June 20, 2014 1:15 to 4:15 p.m.
P.S./PHYSICS The University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PHYSICAL SETTING PHYSICS Friday, June 20, 2014 1:15 to 4:15 p.m., only The possession or use of any communications device
More informationTEACHER ANSWER KEY November 12, 2003. Phys  Vectors 11132003
Phys  Vectors 11132003 TEACHER ANSWER KEY November 12, 2003 5 1. A 1.5kilogram lab cart is accelerated uniformly from rest to a speed of 2.0 meters per second in 0.50 second. What is the magnitude
More informationLab 8: Ballistic Pendulum
Lab 8: Ballistic Pendulum Equipment: Ballistic pendulum apparatus, 2 meter ruler, 30 cm ruler, blank paper, carbon paper, masking tape, scale. Caution In this experiment a steel ball is projected horizontally
More informationSample Questions for the AP Physics 1 Exam
Sample Questions for the AP Physics 1 Exam Sample Questions for the AP Physics 1 Exam Multiplechoice Questions Note: To simplify calculations, you may use g 5 10 m/s 2 in all problems. Directions: Each
More informationA. 81 2 = 6561 times greater. B. 81 times greater. C. equally strong. D. 1/81 as great. E. (1/81) 2 = 1/6561 as great.
Q12.1 The mass of the Moon is 1/81 of the mass of the Earth. Compared to the gravitational force that the Earth exerts on the Moon, the gravitational force that the Moon exerts on the Earth is A. 81 2
More informationWhat Do You Think? For You To Do GOALS
Activity 2 Newton s Law of Universal Gravitation GOALS In this activity you will: Explore the relationship between distance of a light source and intensity of light. Graph and analyze the relationship
More informationReview Vocabulary force: a push or a pull. Vocabulary Newton s third law of motion
Standard 7.3.17: Investigate that an unbalanced force, acting on an object, changes its speed or path of motion or both, and know that if the force always acts toward the same center as the object moves,
More informationHalliday, Resnick & Walker Chapter 13. Gravitation. Physics 1A PHYS1121 Professor Michael Burton
Halliday, Resnick & Walker Chapter 13 Gravitation Physics 1A PHYS1121 Professor Michael Burton II_A2: Planetary Orbits in the Solar System + Galaxy Interactions (You Tube) 21 seconds 131 Newton's Law
More informationSpeed A B C. Time. Chapter 3: Falling Objects and Projectile Motion
Chapter 3: Falling Objects and Projectile Motion 1. Neglecting friction, if a Cadillac and Volkswagen start rolling down a hill together, the heavier Cadillac will get to the bottom A. before the Volkswagen.
More informationv v ax v a x a v a v = = = Since F = ma, it follows that a = F/m. The mass of the arrow is unchanged, and ( )
Week 3 homework IMPORTANT NOTE ABOUT WEBASSIGN: In the WebAssign versions of these problems, various details have been changed, so that the answers will come out differently. The method to find the solution
More informationF N A) 330 N 0.31 B) 310 N 0.33 C) 250 N 0.27 D) 290 N 0.30 E) 370 N 0.26
Physics 23 Exam 2 Spring 2010 Dr. Alward Page 1 1. A 250N force is directed horizontally as shown to push a 29kg box up an inclined plane at a constant speed. Determine the magnitude of the normal force,
More informationAstronomy 110 Homework #04 Assigned: 02/06/2007 Due: 02/13/2007. Name:
Astronomy 110 Homework #04 Assigned: 02/06/2007 Due: 02/13/2007 Name: Directions: Listed below are twenty (20) multiplechoice questions based on the material covered by the lectures this past week. Choose
More informationAtomic Structure: Chapter Problems
Atomic Structure: Chapter Problems Bohr Model Class Work 1. Describe the nuclear model of the atom. 2. Explain the problems with the nuclear model of the atom. 3. According to Niels Bohr, what does n stand
More informationWhat Is Energy? Energy and Work: Working Together. 124 Chapter 5 Energy and Energy Resources
1 What You Will Learn Explain the relationship between energy and work. Compare kinetic and potential energy. Describe the different forms of energy. Vocabulary energy kinetic energy potential energy mechanical
More informationName Partners Date. Energy Diagrams I
Name Partners Date Visual Quantum Mechanics The Next Generation Energy Diagrams I Goal Changes in energy are a good way to describe an object s motion. Here you will construct energy diagrams for a toy
More informationNewton s Law of Universal Gravitation describes the attractive gravitational force that exists between any two bodies with the following equation:
Newton s Laws & Gravitation Newton s Law of Universal Gravitation describes the attractive gravitational force that exists between any two bodies with the following equation: F G = GMm 2 r G is the gravitational
More informationC B A T 3 T 2 T 1. 1. What is the magnitude of the force T 1? A) 37.5 N B) 75.0 N C) 113 N D) 157 N E) 192 N
Three boxes are connected by massless strings and are resting on a frictionless table. Each box has a mass of 15 kg, and the tension T 1 in the right string is accelerating the boxes to the right at a
More informationLAB 6: GRAVITATIONAL AND PASSIVE FORCES
55 Name Date Partners LAB 6: GRAVITATIONAL AND PASSIVE FORCES And thus Nature will be very conformable to herself and very simple, performing all the great Motions of the heavenly Bodies by the attraction
More information2 Newton s First Law of Motion Inertia
2 Newton s First Law of Motion Inertia Conceptual Physics Instructor Manual, 11 th Edition SOLUTIONS TO CHAPTER 2 RANKING 1. C, B, A 2. C, A, B, D 3. a. B, A, C, D b. B, A, C, D 4. a. A=B=C (no force)
More informationVersion A Page 1. 1. The diagram shows two bowling balls, A and B, each having a mass of 7.00 kilograms, placed 2.00 meters apart.
Physics Unit Exam, Kinematics 1. The diagram shows two bowling balls, A and B, each having a mass of 7.00 kilograms, placed 2.00 meters apart. What is the magnitude of the gravitational force exerted by
More informationChapter 7 Momentum and Impulse
Chapter 7 Momentum and Impulse Collisions! How can we describe the change in velocities of colliding football players, or balls colliding with bats?! How does a strong force applied for a very short time
More informationStudy the following diagrams of the States of Matter. Label the names of the Changes of State between the different states.
Describe the strength of attractive forces between particles. Describe the amount of space between particles. Can the particles in this state be compressed? Do the particles in this state have a definite
More informationSPEED, VELOCITY, AND ACCELERATION
reflect Look at the picture of people running across a field. What words come to mind? Maybe you think about the word speed to describe how fast the people are running. You might think of the word acceleration
More informationLAB 4: MOMENTUM AND COLLISIONS
1 Name Date Day/Time of Lab Partner(s) Lab TA LAB 4: MOMENTUM AND COLLISIONS NEWTON S THIRD LAW OBJECTIVES To examine actionreaction force pairs To examine collisions and relate the law of conservation
More informationBounce! Name. Be very careful with the balls. Do not throw them DROP the balls as instructed in the procedure.
Bounce 1 Name Bounce! Be very careful with the balls. Do not throw them DROP the balls as instructed in the procedure. Background information: Energy causes things to happen. During the day, the sun gives
More informationPractice Test SHM with Answers
Practice Test SHM with Answers MPC 1) If we double the frequency of a system undergoing simple harmonic motion, which of the following statements about that system are true? (There could be more than one
More informationThe Physics of Kicking a Soccer Ball
The Physics of Kicking a Soccer Ball Shael Brown Grade 8 Table of Contents Introduction...1 What actually happens when you kick a soccer ball?...2 Who kicks harder shorter or taller people?...4 How much
More informationBHS Freshman Physics Review. Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science.
BHS Freshman Physics Review Chapter 2 Linear Motion Physics is the oldest science (astronomy) and the foundation for every other science. Galileo (15641642): 1 st true scientist and 1 st person to use
More informationExam # 1 Thu 10/06/2010 Astronomy 100/190Y Exploring the Universe Fall 11 Instructor: Daniela Calzetti
Exam # 1 Thu 10/06/2010 Astronomy 100/190Y Exploring the Universe Fall 11 Instructor: Daniela Calzetti INSTRUCTIONS: Please, use the `bubble sheet and a pencil # 2 to answer the exam questions, by marking
More informationLecture 16. Newton s Second Law for Rotation. Moment of Inertia. Angular momentum. Cutnell+Johnson: 9.4, 9.6
Lecture 16 Newton s Second Law for Rotation Moment of Inertia Angular momentum Cutnell+Johnson: 9.4, 9.6 Newton s Second Law for Rotation Newton s second law says how a net force causes an acceleration.
More informationThe University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PHYSICAL SETTING PHYSICS. Tuesday, June 22, 2010 9:15 a.m. to 12:15 p.m.
PS/PHYSICS The University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PHYSICAL SETTING PHYSICS Tuesday, June 22, 2010 9:15 a.m. to 12:15 p.m., only The answers to all questions in this examination
More informationWork, Energy and Power Practice Test 1
Name: ate: 1. How much work is required to lift a 2kilogram mass to a height of 10 meters?. 5 joules. 20 joules. 100 joules. 200 joules 5. ar and car of equal mass travel up a hill. ar moves up the hill
More informationForce on Moving Charges in a Magnetic Field
[ Assignment View ] [ Eðlisfræði 2, vor 2007 27. Magnetic Field and Magnetic Forces Assignment is due at 2:00am on Wednesday, February 28, 2007 Credit for problems submitted late will decrease to 0% after
More informationLeaPS Workshop March 12, 2010 Morehead Conference Center Morehead, KY
LeaPS Workshop March 12, 2010 Morehead Conference Center Morehead, KY Word Bank: Acceleration, mass, inertia, weight, gravity, work, heat, kinetic energy, potential energy, closed systems, open systems,
More informationLAB 6  GRAVITATIONAL AND PASSIVE FORCES
L061 Name Date Partners LAB 6  GRAVITATIONAL AND PASSIVE FORCES OBJECTIVES And thus Nature will be very conformable to herself and very simple, performing all the great Motions of the heavenly Bodies
More information5. Forces and MotionI. Force is an interaction that causes the acceleration of a body. A vector quantity.
5. Forces and MotionI 1 Force is an interaction that causes the acceleration of a body. A vector quantity. Newton's First Law: Consider a body on which no net force acts. If the body is at rest, it will
More informationForces. When an object is pushed or pulled, we say that a force is exerted on it.
Forces When an object is pushed or pulled, we say that a force is exerted on it. Forces can Cause an object to start moving Change the speed of a moving object Cause a moving object to stop moving Change
More informationReview Assessment: Lec 02 Quiz
COURSES > PHYSICS GUEST SITE > CONTROL PANEL > 1ST SEM. QUIZZES > REVIEW ASSESSMENT: LEC 02 QUIZ Review Assessment: Lec 02 Quiz Name: Status : Score: Instructions: Lec 02 Quiz Completed 20 out of 100 points
More informationWork, Energy and Power
Work, Energy and Power In this section of the Transport unit, we will look at the energy changes that take place when a force acts upon an object. Energy can t be created or destroyed, it can only be changed
More informationThursday 13 June 2013 Morning
THIS IS A NEW SPECIFICATION H Thursday 13 June 2013 Morning GCSE TWENTY FIRST CENTURY SCIENCE PHYSICS A A182/02 Modules P4 P5 P6 (Higher Tier) *A137290613* Candidates answer on the Question Paper. A calculator
More informationNewton s Laws Quiz Review
Newton s Laws Quiz Review Name Hour To be properly prepared for this quiz you should be able to do the following: 1) state each of Newton s three laws of motion 2) pick out examples of the three laws from
More informationforce (mass)(acceleration) or F ma The unbalanced force is called the net force, or resultant of all the forces acting on the system.
4 Forces 41 Forces and Acceleration Vocabulary Force: A push or a pull. When an unbalanced force is exerted on an object, the object accelerates in the direction of the force. The acceleration is proportional
More informationKinetic Energy (A) stays the same stays the same (B) increases increases (C) stays the same increases (D) increases stays the same.
1. A cart full of water travels horizontally on a frictionless track with initial velocity v. As shown in the diagram, in the back wall of the cart there is a small opening near the bottom of the wall
More information60 Questions Basic Physics Paul G. Hewitt
60 Questions Basic Physics Paul G. Hewitt Challenge: Here are 60 questions on basic physics that you likely think your students can handle. But if you re not focusing on the qualitative question sets in
More informationEDUH 1017  SPORTS MECHANICS
4277(a) Semester 2, 2011 Page 1 of 9 THE UNIVERSITY OF SYDNEY EDUH 1017  SPORTS MECHANICS NOVEMBER 2011 Time allowed: TWO Hours Total marks: 90 MARKS INSTRUCTIONS All questions are to be answered. Use
More informationKE =? v o. Page 1 of 12
Page 1 of 12 CTEnergy1. A mass m is at the end of light (massless) rod of length R, the other end of which has a frictionless pivot so the rod can swing in a vertical plane. The rod is initially horizontal
More informationChapter 5 Using Newton s Laws: Friction, Circular Motion, Drag Forces. Copyright 2009 Pearson Education, Inc.
Chapter 5 Using Newton s Laws: Friction, Circular Motion, Drag Forces Units of Chapter 5 Applications of Newton s Laws Involving Friction Uniform Circular Motion Kinematics Dynamics of Uniform Circular
More informationElements in the periodic table are indicated by SYMBOLS. To the left of the symbol we find the atomic mass (A) at the upper corner, and the atomic num
. ATOMIC STRUCTURE FUNDAMENTALS LEARNING OBJECTIVES To review the basics concepts of atomic structure that have direct relevance to the fundamental concepts of organic chemistry. This material is essential
More informationPhysics 1401  Exam 2 Chapter 5NNew
Physics 1401  Exam 2 Chapter 5NNew 2. The second hand on a watch has a length of 4.50 mm and makes one revolution in 60.00 s. What is the speed of the end of the second hand as it moves in uniform circular
More informationGRADE 8 SCIENCE INSTRUCTIONAL TASKS. Gravity
GRADE 8 SCIENCE INSTRUCTIONAL TASKS Gravity GradeLevel Expectations The exercises in these instructional tasks address content related to the following science gradelevel expectation(s): ESSMC3 Relate
More information