Chapter 8: Rotational Motion of Solid Objects


 Philomena Gardner
 3 years ago
 Views:
Transcription
1 Chapter 8: Rotational Motion of Solid Objects 1. An isolated object is initially spinning at a constant speed. Then, although no external forces act upon it, its rotational speed increases. This must be due to A. an increase in the moment of inertia. B. an increase in the mass. C. an increase in the angular momentum. D. a decrease in the moment of inertia. E. impossible, angular momentum conservation is violated. 2. The bigger gears on the rear wheel of a multispeed bike allow the rider to A. exert more force on the wheel. B. exert more torque on the wheel. C. increase the moment of inertia of the wheel. D. decrease the moment of inertia of the wheel. 3. Three horses are sidebyside on a merrygoround: one at the edge, one near the axis, and one in between. Each horse has the same angular speed. Which horse has the greatest linear speed? A. The horse nearest the axis. B. The horse in the middle C. The horse at the edge. D. The linear speed is the same for all three horses. 4. A sphere and a hoop have the same diameter and the same mass. If they are released from rest at the top of an incline, which will reach the bottom more quickly? A. The sphere. B. The hoop. C. Both will require the same time to reach the bottom. 5. A torque acting on a body tends to produce A. equilibrium. B. linear velocity. C. a new center of gravity. D. angular rotation.
2 6. The angular momentum of an isolated object can be changed only by A. changing its rotational inertia. B. applying a force along the axis of rotation. C. applying a torque. 7. The rotational inertia of an object depends on which of these? A. Its color. B. How fast it is spinning. C. The amount of torque applied to it. D. How its mass is distributed about the spin axis. E. None of the above. 8. A football thrown with a spinning motion is more stable than one thrown without spin because A. its angular momentum is conserved. B. it is easier to part the air if it is spinning. C. gravity ignores spinning objects. D. the torque generated by the spinning action is conserved. 9. An object is moving in a horizontal circle, in a clockwise direction (as seen from above). In which direction does its angular momentum vector point? A. down B. up C. to the left D. toward the center of the circle 10. Using a longer handled wrench to loosen a tight nut allows you to A. exert more force on the nut. B. increase the moment of inertia of the nut. C. apply more torque to the nut. D. pull harder on the wrench. 11. A figure skater is spinning with her arms extended. She now pulls her arms close to her body. What happens? A. Her angular momentum increases. B. Her angular momentum decreases. C. Her moment of inertia increases. D. Her moment of inertia decreases.
3 12. A dancer begins performing a pirouette with arms extended. (A pirouette is a complete spin about a vertical axis.) This motion is completed most easily when the rotational inertia is decreased by A. ending at the waist at a right angle. B. extending the arms and one leg straight out to the sides. C. holding the arms straight up and extending one foot straight out to the side. D. bringing the arms and legs in a line with the body. 13. Because the rotational inertia is higher, it is hardest in springboard diving to perform a forward somersault in A. the straight position (no bending at knees or waist). B. the pike position (bending at the waist but not the knees). C. the tuck position (bending at both the waist and knees). 14. When a bicycle pedal is at the top of its motion, you can exert the greatest torque on the crank by A. pushing straight down on the pedal with your foot. B. pushing straight forward on the pedal with your foot. C. hooking your toes under the pedal and pulling upward. 15. A solid disk and a hollow disk are released together (from rest) to roll down an incline. They have the same diameter and mass. A. The hollow disk will reach the bottom first. B. They will reach the bottom at the same time. C. The solid disk will reach the bottom first. 16. In a stable stack of identical boards at the edge of a table, the center of gravity of the top board A. must lie above the table. B. must lie above the next lower board. C. must lie above the bottom board. D. need not lie over anything. 17. You stand with your heels against a wall and bend ninety degrees forward at the waist. A. You are able to maintain your balance. B. You fall forward because of the momentum you gain when you move. C. You fall forward because your center of gravity moves ahead of your base of support. D. You fall forward because the muscles in your feet aren't strong enough to stop you.
4 18. A constant torque is applied to a flywheel. Which of the following mechanical quantities will be constant? A. rotational energy B. angular momentum C. rotational acceleration D. rotational velocity E. linear velocity of a particle on the rim 19. A flywheel is used to minimize changes in rotational velocity as the torque or the load changes. The rotational inertia of a flywheel should be chosen to be A. as small as possible. B. as large as possible. C. anything  it doesn't matter. 20. Three different bodies  a uniform sphere, a uniform disk, and a hoop  all have same radius and same mass. The body with the largest rotational inertia will be A. the hoop. B. the sphere. C. the disk. D. none, as all have the same value of rotational inertia. 21. In using a long steel rod as a lever to move a large rock, where should the fulcrum be placed? A. Halfway between the rock and the applied force. B. Close to the rock. C. Close the point where the force is applied. D. Anywhere in between  it makes no difference. 22. The angular momentum of a rotating body is conserved when A. no net force acts on the body. B. no net torque acts on the body. C. when the body has a constant angular acceleration. D. when a shape of the body does not change. 23. When an ice skater twirling on the point of a skate draws her arms in she ends up whirling faster. This is because A. rotational energy is conserved. B. angular momentum is conserved. C. linear momentum is conserved. D. a net torque acts on the skater.
5 24. A gyroscope consists of a wheel mounted on an axle aligned along a northsouth direction. The south end of the axle is suspended by a rope attached to the ceiling, and the north end is manually held at rest. The wheel is spinning rapidly, so that its angular momentum vector points north. Suddenly the north end is released. Since there is spin, the north end of the axle will begin to move A. north. B. west. C. down. D. east. E. south. 25. The rotational velocity of a 45 rev/min phonograph record in rad/s is approximately: A. 45 rad/s. B. 283 rad/s. C rad/s. D. 4.7 rad/s. E rad/s. 26. The armature of a motor is accelerated uniformly from rest to a rotational velocity of 1800 rev/min in 10 seconds. The rotational acceleration of the motor is A. 180 rad/s 2. B. 90 rad/s 2. C rad/s 2. D rad/s 2. E. zero. 27. Which of the following is an appropriate unit for describing rotational acceleration? A. m/s 2. B. rad/min. C. rev/min. D. rev/m/s. E. rev/min 2. Answer: E 28. A wheel is spinning on an axle. The linear velocity of a point on the rim is the product of the radius times the rotational velocity, if the latter is measured in units of: A. deg/s. B. rev/s. C. rev/min. D. rad/s. E. deg/min.
6 29. Torque in the metric system is measured in units of: A. N. B. Ns. C. Nrad. D. N/m. E. Nm. Answer: E 30. A body of rotational inertia 1.0 kg m 2 is acted upon by a torque of 2.0 Nm. The angular acceleration of the body will be: A. 0.5 rad/s 2. B. 0.5 rev/s 2. C. 1.0 rad/s 2. D. 2.0 rad/s 2. E. 2.0 rev/s A merrygoround, having a radius of 2.0 m, is set in motion by students applying a force of 500 N tangential to the rim of the wheel. The merrygoround reaches a rotational velocity of 2.0 rad/s after 10 seconds, starting from rest. The rotational inertia of the merrygoround is A. 1.0 x 10 5 kg m 2 B. 5.0 x 10 3 kg m 2 C. 5.0 x 10 4 kg m 2 D. 5.0 x 10 5 kg m 2 E. 1.0 x 10 4 kg m A student plays on a seesaw with her father. The student has a weight of 250 N and is seated 2.4 m from the axis of rotation. Her father balances her when he is seated 0.8 m from the axis. The father's weight is: A. 250 N. B. 500 N. C. 667 N. D. 725 N. E. 750 N. Answer: E 33. A solid disk and a hoop have different diameters and different masses. If they are released from rest at the top of an incline, which will reach the bottom more quickly? A. The solid disk. B. The hoop. C. Both will reach the bottom at the same time. D. Impossible to say without knowing which object has larger diameter. E. Impossible to say without knowing which object has larger mass.
7 34. A bicycle exhibits greater stability when the angular momentum of the wheels is A. smaller. B. larger. C. any value. 35. If the net force on a body is zero, the net torque on the body is A. always zero. B. not necessarily zero. C. certainly not zero. 36. If the net torque on a body is zero, the net force on the body is A. always zero. B. not necessarily zero. C. certainly not zero. 37. Just as torque is the rotational analogue of force in linear motion, rotational inertia is the rotational analogue of in linear motion. Answer: mass 38. When a mechanic uses an extension arm on his wrench to loosen a stubborn nut, he is exerting additional torque because of an increase in the (two words) of the force. Answer: lever arm 39. The angular momentum of a rotating body is constant when the net on the body is zero. Answer: torque 40. A merrygoround is set into motion with a child on board. The rotational speed of the merrygoround as the child moves outward along a radius. Answer: decreases 41. If the net force on a body is zero the net torque is (always, not necessarily, cannot be) zero. Answer: not necessarily 42. Consider the human forearm as a lever with the elbow the fulcrum. When a body of a given weight is held in the hand the force exerted by the muscles on the arm is than the weight. Answer: greater
Unit 4 Practice Test: Rotational Motion
Unit 4 Practice Test: Rotational Motion Multiple Guess Identify the letter of the choice that best completes the statement or answers the question. 1. How would an angle in radians be converted to an angle
More informationChapter 10 Rotational Motion. Copyright 2009 Pearson Education, Inc.
Chapter 10 Rotational Motion Angular Quantities Units of Chapter 10 Vector Nature of Angular Quantities Constant Angular Acceleration Torque Rotational Dynamics; Torque and Rotational Inertia Solving Problems
More informationAngular acceleration α
Angular Acceleration Angular acceleration α measures how rapidly the angular velocity is changing: Slide 70 Linear and Circular Motion Compared Slide 7 Linear and Circular Kinematics Compared Slide 7
More informationLinear Motion vs. Rotational Motion
Linear Motion vs. Rotational Motion Linear motion involves an object moving from one point to another in a straight line. Rotational motion involves an object rotating about an axis. Examples include a
More informationPhysics 201 Homework 8
Physics 201 Homework 8 Feb 27, 2013 1. A ceiling fan is turned on and a net torque of 1.8 Nm is applied to the blades. 8.2 rad/s 2 The blades have a total moment of inertia of 0.22 kgm 2. What is the
More informationCenter of Gravity. We touched on this briefly in chapter 7! x 2
Center of Gravity We touched on this briefly in chapter 7! x 1 x 2 cm m 1 m 2 This was for what is known as discrete objects. Discrete refers to the fact that the two objects separated and individual.
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 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 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 informationRotation: Moment of Inertia and Torque
Rotation: Moment of Inertia and Torque Every time we push a door open or tighten a bolt using a wrench, we apply a force that results in a rotational motion about a fixed axis. Through experience we learn
More informationPhysics 1A Lecture 10C
Physics 1A Lecture 10C "If you neglect to recharge a battery, it dies. And if you run full speed ahead without stopping for water, you lose momentum to finish the race. Oprah Winfrey Static Equilibrium
More informationPHY121 #8 Midterm I 3.06.2013
PHY11 #8 Midterm I 3.06.013 AP Physics Newton s Laws AP Exam Multiple Choice Questions #1 #4 1. When the frictionless system shown above is accelerated by an applied force of magnitude F, the tension
More informationPHYSICS 111 HOMEWORK SOLUTION #9. April 5, 2013
PHYSICS 111 HOMEWORK SOLUTION #9 April 5, 2013 0.1 A potter s wheel moves uniformly from rest to an angular speed of 0.16 rev/s in 33 s. Find its angular acceleration in radians per second per second.
More informationSolution Derivations for Capa #11
Solution Derivations for Capa #11 1) A horizontal circular platform (M = 128.1 kg, r = 3.11 m) rotates about a frictionless vertical axle. A student (m = 68.3 kg) walks slowly from the rim of the platform
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 informationPHYS 1014M, Fall 2005 Exam #3. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
PHYS 1014M, Fall 2005 Exam #3 Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A bicycle wheel rotates uniformly through 2.0 revolutions in
More informationLecture 17. Last time we saw that the rotational analog of Newton s 2nd Law is
Lecture 17 Rotational Dynamics Rotational Kinetic Energy Stress and Strain and Springs Cutnell+Johnson: 9.49.6, 10.110.2 Rotational Dynamics (some more) Last time we saw that the rotational analog of
More informationLab 7: Rotational Motion
Lab 7: Rotational Motion Equipment: DataStudio, rotary motion sensor mounted on 80 cm rod and heavy duty bench clamp (PASCO ME9472), string with loop at one end and small white bead at the other end (125
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 informationPHYSICS 111 HOMEWORK SOLUTION #10. April 8, 2013
PHYSICS HOMEWORK SOLUTION #0 April 8, 203 0. Find the net torque on the wheel in the figure below about the axle through O, taking a = 6.0 cm and b = 30.0 cm. A torque that s produced by a force can be
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 informationDynamics of Rotational Motion
Chapter 10 Dynamics of Rotational Motion PowerPoint Lectures for University Physics, Twelfth Edition Hugh D. Young and Roger A. Freedman Lectures by James Pazun Modified by P. Lam 5_31_2012 Goals for Chapter
More informationHW Set VI page 1 of 9 PHYSICS 1401 (1) homework solutions
HW Set VI page 1 of 9 1030 A 10 g bullet moving directly upward at 1000 m/s strikes and passes through the center of mass of a 5.0 kg block initially at rest (Fig. 1033 ). The bullet emerges from the
More informationPractice Exam Three Solutions
MASSACHUSETTS INSTITUTE OF TECHNOLOGY Department of Physics Physics 8.01T Fall Term 2004 Practice Exam Three Solutions Problem 1a) (5 points) Collisions and Center of Mass Reference Frame In the lab frame,
More informationChapter 11. h = 5m. = mgh + 1 2 mv 2 + 1 2 Iω 2. E f. = E i. v = 4 3 g(h h) = 4 3 9.8m / s2 (8m 5m) = 6.26m / s. ω = v r = 6.
Chapter 11 11.7 A solid cylinder of radius 10cm and mass 1kg starts from rest and rolls without slipping a distance of 6m down a house roof that is inclined at 30 degrees (a) What is the angular speed
More informationLecture Presentation Chapter 7 Rotational Motion
Lecture Presentation Chapter 7 Rotational Motion Suggested Videos for Chapter 7 Prelecture Videos Describing Rotational Motion Moment of Inertia and Center of Gravity Newton s Second Law for Rotation Class
More information226 Chapter 15: OSCILLATIONS
Chapter 15: OSCILLATIONS 1. In simple harmonic motion, the restoring force must be proportional to the: A. amplitude B. frequency C. velocity D. displacement E. displacement squared 2. An oscillatory motion
More informationTorque and Rotation. Physics
Torque and Rotation Physics Torque Force is the action that creates changes in linear motion. For rotational motion, the same force can cause very different results. A torque is an action that causes objects
More information3600 s 1 h. 24 h 1 day. 1 day
Week 7 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 informationLEVEL I SKATING TECHNICAL. September 2007 Page 1
SKATING September 2007 Page 1 SKATING SKILLS The game of Ice Hockey is a fastpaced, complex, team sport, which demands quick thinking, fast reactions and special athletic skills. Skating is the most important
More informationSOLID MECHANICS TUTORIAL MECHANISMS KINEMATICS  VELOCITY AND ACCELERATION DIAGRAMS
SOLID MECHANICS TUTORIAL MECHANISMS KINEMATICS  VELOCITY AND ACCELERATION DIAGRAMS This work covers elements of the syllabus for the Engineering Council exams C105 Mechanical and Structural Engineering
More informationTIME OF COMPLETION NAME SOLUTION DEPARTMENT OF NATURAL SCIENCES. PHYS 1111, Exam 3 Section 1 Version 1 December 6, 2005 Total Weight: 100 points
TIME OF COMPLETION NAME SOLUTION DEPARTMENT OF NATURAL SCIENCES PHYS 1111, Exam 3 Section 1 Version 1 December 6, 2005 Total Weight: 100 points 1. Check your examination for completeness prior to starting.
More information11. Rotation Translational Motion: Rotational Motion:
11. Rotation Translational Motion: Motion of the center of mass of an object from one position to another. All the motion discussed so far belongs to this category, except uniform circular motion. Rotational
More informationAP Physics: Rotational Dynamics 2
Name: Assignment Due Date: March 30, 2012 AP Physics: Rotational Dynamics 2 Problem A solid cylinder with mass M, radius R, and rotational inertia 1 2 MR2 rolls without slipping down the inclined plane
More informationRange of Motion. A guide for you after spinal cord injury. Spinal Cord Injury Rehabilitation Program
Range of Motion A guide for you after spinal cord injury Spinal Cord Injury Rehabilitation Program This booklet has been written by the health care providers who provide care to people who have a spinal
More informationSimple Machines. What are simple machines?
Definitions to know: Simple Machines Work done when an applied force causes an object to move in the direction of the force Energy ability to cause change; can change the speed, direction, shape, or temperature
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 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 informationMidterm Solutions. mvr = ω f (I wheel + I bullet ) = ω f 2 MR2 + mr 2 ) ω f = v R. 1 + M 2m
Midterm Solutions I) A bullet of mass m moving at horizontal velocity v strikes and sticks to the rim of a wheel a solid disc) of mass M, radius R, anchored at its center but free to rotate i) Which of
More information8.012 Physics I: Classical Mechanics Fall 2008
MIT OpenCourseWare http://ocw.mit.edu 8.012 Physics I: Classical Mechanics Fall 2008 For information about citing these materials or our Terms of Use, visit: http://ocw.mit.edu/terms. MASSACHUSETTS INSTITUTE
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 informationEVALUAT ING ACADEMIC READINESS FOR APPRENTICESHIP TRAINING Revised for ACCESS TO APPRENTICESHIP
EVALUAT ING ACADEMIC READINESS FOR APPRENTICESHIP TRAINING for ACCESS TO APPRENTICESHIP SCIENCE SKILLS SIMPLE MACHINES & MECHANICAL ADVANTAGE AN ACADEMIC SKILLS MANUAL for The Construction Trades: Mechanical
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 informationRotational Inertia Demonstrator
WWW.ARBORSCI.COM Rotational Inertia Demonstrator P33545 BACKGROUND: The Rotational Inertia Demonstrator provides an engaging way to investigate many of the principles of angular motion and is intended
More informationSOLID MECHANICS DYNAMICS TUTORIAL MOMENT OF INERTIA. This work covers elements of the following syllabi.
SOLID MECHANICS DYNAMICS TUTOIAL MOMENT OF INETIA This work covers elements of the following syllabi. Parts of the Engineering Council Graduate Diploma Exam D5 Dynamics of Mechanical Systems Parts of the
More informationPh\sics 2210 Fall 2012  Novcmbcr 21 David Ailion
Ph\sics 2210 Fall 2012  Novcmbcr 21 David Ailion Unid: Discussion T A: Bryant Justin Will Yuan 1 Place answers in box provided for each question. Specify units for each answer. Circle correct answer(s)
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 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 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 informationSimple Machines. Figure 2: Basic design for a mousetrap vehicle
Mousetrap Vehicles Figure 1: This sample mousetrappowered vehicle has a large drive wheel and a small axle. The vehicle will move slowly and travel a long distance for each turn of the wheel. 1 People
More informationChapter 11 Equilibrium
11.1 The First Condition of Equilibrium The first condition of equilibrium deals with the forces that cause possible translations of a body. The simplest way to define the translational equilibrium of
More informationANSWER KEY. Work and Machines
Chapter Project Worksheet 1 1. inclined plane, wedge, screw, lever, wheel and axle, pulley 2. pulley 3. lever 4. inclined plane 5. Answers will vary: top, side, or bottom 6. Answers will vary; only one
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 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 information1. Units of a magnetic field might be: A. C m/s B. C s/m C. C/kg D. kg/c s E. N/C m ans: D
Chapter 28: MAGNETIC FIELDS 1 Units of a magnetic field might be: A C m/s B C s/m C C/kg D kg/c s E N/C m 2 In the formula F = q v B: A F must be perpendicular to v but not necessarily to B B F must be
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 informationUniversal Law of Gravitation
Universal Law of Gravitation Law: Every body exerts a force of attraction on every other body. This force called, gravity, is relatively weak and decreases rapidly with the distance separating the bodies
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 informationInclined Plane: Distance vs. Force
1a Inclined Plane: Distance vs. Force Look at the inclined plane model you built for Card 2. It s a ramp, so it s easy to slide or roll things up and down it. As you noticed, it is a little more difficult
More informationSo if ω 0 increases 3fold, the stopping angle increases 3 2 = 9fold.
Name: MULTIPLE CHOICE: Questions 111 are 5 points each. 1. A safety device brings the blade of a power mower from an angular speed of ω 1 to rest in 1.00 revolution. At the same constant angular acceleration,
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 informationCentripetal Force. This result is independent of the size of r. A full circle has 2π rad, and 360 deg = 2π rad.
Centripetal Force 1 Introduction In classical mechanics, the dynamics of a point particle are described by Newton s 2nd law, F = m a, where F is the net force, m is the mass, and a is the acceleration.
More informationE X P E R I M E N T 8
E X P E R I M E N T 8 Torque, Equilibrium & Center of Gravity Produced by the Physics Staff at Collin College Copyright Collin College Physics Department. All Rights Reserved. University Physics, Exp 8:
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 informationCHAPTER 15 FORCE, MASS AND ACCELERATION
CHAPTER 5 FORCE, MASS AND ACCELERATION EXERCISE 83, Page 9. A car initially at rest accelerates uniformly to a speed of 55 km/h in 4 s. Determine the accelerating force required if the mass of the car
More information30 minutes in class, 2 hours to make the first time
Asking questions and defining problems Developing and using models Planning and carrying out investigations 30 minutes in class, 2 hours to make the first time 3 12 x 24 x ¾ inch plywood boards 1 x 12
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 informationConditioning From Gym To Home To Gym
Page 1 of 6 Conditioning From Gym To Home To Gym by Vladimir Artemov, Olympic and World Champion and USA Gymnastics Women's National Clinician In the beginning, and throughout the training process, conditioning
More informationMechanical Principles
Unit 4: Mechanical Principles Unit code: F/601/1450 QCF level: 5 Credit value: 15 OUTCOME 4 POWER TRANSMISSION TUTORIAL 2 BALANCING 4. Dynamics of rotating systems Single and multilink mechanisms: slider
More informationInstructor Training Program Levels 1 through 4 Uneven Bars
USA Gymnastics Online: Technique: Uneven Bars Page 1 of 9 Instructor Training Program Levels 1 through 4 Uneven Bars Level 1  Uneven Bars MOUNT: BACK HIP PULLOVER Grasp bar with hands "shoulder width"
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 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 informationTorque and Rotary Motion
Torque and Rotary Motion Name Partner Introduction Motion in a circle is a straightforward extension of linear motion. According to the textbook, all you have to do is replace displacement, velocity,
More informationProblem Set 1. Ans: a = 1.74 m/s 2, t = 4.80 s
Problem Set 1 1.1 A bicyclist starts from rest and after traveling along a straight path a distance of 20 m reaches a speed of 30 km/h. Determine her constant acceleration. How long does it take her to
More informationTORQUE AND FIRSTCLASS LEVERS
TORQUE AND FIRSTCLASS LEVERS LAB MECH 28.COMP From Physics, Eugene Hecht and Physical Science with Computers, Vernier Software & Technology INTRODUCTION In Figure 1, note force F acting on a wrench along
More informationMagnetism. d. gives the direction of the force on a charge moving in a magnetic field. b. results in negative charges moving. clockwise.
Magnetism 1. An electron which moves with a speed of 3.0 10 4 m/s parallel to a uniform magnetic field of 0.40 T experiences a force of what magnitude? (e = 1.6 10 19 C) a. 4.8 10 14 N c. 2.2 10 24 N b.
More informationChapter 7 Homework solutions
Chapter 7 Homework solutions 8 Strategy Use the component form of the definition of center of mass Solution Find the location of the center of mass Find x and y ma xa + mbxb (50 g)(0) + (10 g)(5 cm) x
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 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 informationAP Physics Circular Motion Practice Test B,B,B,A,D,D,C,B,D,B,E,E,E, 14. 6.6m/s, 0.4 N, 1.5 m, 6.3m/s, 15. 12.9 m/s, 22.9 m/s
AP Physics Circular Motion Practice Test B,B,B,A,D,D,C,B,D,B,E,E,E, 14. 6.6m/s, 0.4 N, 1.5 m, 6.3m/s, 15. 12.9 m/s, 22.9 m/s Answer the multiple choice questions (2 Points Each) on this sheet with capital
More informationWind Turbines. Wind Turbines 2. Wind Turbines 4. Wind Turbines 3. Wind Turbines 5. Wind Turbines 6
Wind Turbines 1 Wind Turbines 2 Introductory Question Wind Turbines You and a child half your height lean out over the edge of a pool at the same angle. If you both let go simultaneously, who will tip
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 informationBiomechanics of cycling  Improving performance and reducing injury through biomechanics
Biomechanics of cycling  Improving performance and reducing injury through biomechanics Biomechanics is the science concerned with the forces that act on the human body and the effects these forces produce.
More informationLong Jump Mechanics THE 13 PACE RUNUP THE LAST 3 STRIDES THE TAKEOFF
Long Jump Mechanics Two major techniques are used in long jumping: the hang technique and the hitchkick technique. In the hang technique, the jumper appears to temporarily hang in the air during flight.
More informationAP1 Oscillations. 1. Which of the following statements about a springblock oscillator in simple harmonic motion about its equilibrium point is false?
1. Which of the following statements about a springblock oscillator in simple harmonic motion about its equilibrium point is false? (A) The displacement is directly related to the acceleration. (B) The
More information10.1 Quantitative. Answer: A Var: 50+
Chapter 10 Energy and Work 10.1 Quantitative 1) A child does 350 J of work while pulling a box from the ground up to his tree house with a rope. The tree house is 4.8 m above the ground. What is the mass
More informationMoving and Handling Techniques
Moving and Handling Techniques Introduction Manual handling involves any activity that requires the use of force exerted by a person to lift, lower, push, pull, carry or otherwise move or hold an object.
More informationBiomechanics Sample Problems
Biomechanics Sample Problems Forces 1) A 90 kg ice hockey player collides head on with an 80 kg ice hockey player. If the first person exerts a force of 450 N on the second player, how much force does
More informationFootball Learning Guide for Parents and Educators. Overview
Overview Did you know that when Victor Cruz catches a game winning touchdown, the prolate spheroid he s holding helped the quarterback to throw a perfect spiral? Wait, what? Well, the shape of a football
More informationFundamental Mechanics: Supplementary Exercises
Phys 131 Fall 2015 Fundamental Mechanics: Supplementary Exercises 1 Motion diagrams: horizontal motion A car moves to the right. For an initial period it slows down and after that it speeds up. Which of
More informationEXPERIMENT: MOMENT OF INERTIA
OBJECTIVES EXPERIMENT: MOMENT OF INERTIA to familiarize yourself with the concept of moment of inertia, I, which plays the same role in the description of the rotation of a rigid body as mass plays in
More informationOwner s Manual Read and keep this manual. Patents World Wide
Owner s Manual Read and keep this manual. Patents World Wide S & S Industries, Inc., Sarasota, FL, USA www.trailgator.com Copyright 2008 All Rights Reserved The following manual is provided to assist
More informationEXERCISE INSTRUCTIONS 1
EXERCISE INSTRUCTIONS 1 Contents ANKLE TOUCHES... 4 BACK EXTENSIONS... 4 BACK REVERSE FLYES... 4 BALL ROLL... 4 BASKETBALL SQUATS... 4 BEAR CRAWL... 4 BICEP CURL (Resistance Band)... 4 BOXING JABS... 5
More informationMECHANICAL PRINCIPLES OUTCOME 4 MECHANICAL POWER TRANSMISSION TUTORIAL 1 SIMPLE MACHINES
MECHANICAL PRINCIPLES OUTCOME 4 MECHANICAL POWER TRANSMISSION TUTORIAL 1 SIMPLE MACHINES Simple machines: lifting devices e.g. lever systems, inclined plane, screw jack, pulley blocks, Weston differential
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 informationPhysics 41 HW Set 1 Chapter 15
Physics 4 HW Set Chapter 5 Serway 8 th OC:, 4, 7 CQ: 4, 8 P: 4, 5, 8, 8, 0, 9,, 4, 9, 4, 5, 5 Discussion Problems:, 57, 59, 67, 74 OC CQ P: 4, 5, 8, 8, 0, 9,, 4, 9, 4, 5, 5 Discussion Problems:, 57, 59,
More informationMechanical Reasoning Review
Mechanical Reasoning Review Work can be made easier or faster through practical applications of simple and/or compound machines. This is called mechanical advantage  in other words, using the principal
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 informationPractice TEST 2. Explain your reasoning
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
More informationExercises for older people
Exercise for older people Exercises for older people Sitting Getting started If you ve not done much physical activity for a while, you may want to get the allclear from a GP before starting. For the
More information