Pascal s Principle. Any change in the pressure of a fluid is transmitted uniformly in all directions throughout the fluid.

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Pascal s Principle. Any change in the pressure of a fluid is transmitted uniformly in all directions throughout the fluid."

Transcription

1 Pascal s Principle What happens inside a fluid when pressure is exerted on it? Does pressure have a direction? Does it transmit a force to the walls or bottom of a container? Any change in the pressure of a fluid is transmitted uniformly in all directions throughout the fluid.

2 Boyle s Law Boyle discovered that the volume of a gas is inversely proportional to the pressure. Boyle s Law: PV = constant If the pressure increases, the volume decreases. P 1 V 1 = P 2 V 2 At higher altitude, the air density become smaller, i.e. larger volume, the air pressure become smaller. This is the reason of the balloon inflation.

3 Archimedes Principle The average density of an object compared to a fluid determines whether the object will sink or float in that liquid. The upward force that pushes objects back toward the surface in liquids is called the buoyant force. Archimedes Principle: The buoyant force acting on an object fully or partially submerged in a fluid is equal to the weight of the fluid displaced by the object.

4 consider a block submerged in water, suspended from a string. The pressure of the water pushes on the block from all sides. Because the pressure increases with depth, the pressure at the bottom of the block is greater than at the top. There is a larger force (F = PA) pushing up at the bottom than there is pushing down at the top. The difference between these two forces is the buoyant force. F = mg = density*volume*g pressure = F/A = density*g*volume/a volume/a =height pressure = density*g*height = ρgh Pascal s principle says: ρgh is the same everywhere and in all directions.

5 Ch 9 CP 4 Wooden boat: 3m x 1.5m x 1m that carries five people. Total mass of boat and people equals 1200 kg. a) What is total weight? b) What is buoyant force required to float? c) What volume of water must be displaced to float? d) How much of the boat underwater? a) W = Mg = 1200 kg (9.8 m/s 2 ) W = N b) F net = F b W = 0 F b = N c) F W b = H2O Vg (see Ch 9 E 12) F b / H2O g = 11760N/(1000 kg/m3)(9.8 m/s2) = V = 1.2 m3 d) V = LWh = (3m)(1.5m)h = 1.2 m 3 h = 0.27 m 3m F b 1m 3/2/2011 Physics 214 Fall

6 2A-03 Vacuum Demos Effects of Vacuum on objects made largely of air or air pockets. Why do the balloons burst in the vacuum? Why do the marshmallows get bigger in vacuum? Do the balloons burst in vacuum differently then they normally burst? What will happen when the marshmallows are returned to normal pressure? Can you guess what happens when Shaving Cream is placed in vacuum? AN AIR-POCKET/BALLOON WILL EXPAND WHEN THE PRESSURE IS REDUCED AND IT WILL DEFLATE WHEN THE PRESSURE IS INCREASED. SO BALLOONS WILL EXPAND AS THEY RISE IN THE ATMOSHPERE AND THE EXPANSION OF A PARTIALLY EVACUATED CAN IS USED IN BAROMETERS. 3/2/2011 Physics 214 Fall

7 2B-04 Liquid Pressure Investigating Pressure in different directions within a liquid in equilibrium. What will happen to the reading on the manometer as the sensor is rotated? The increase in pressure ρgh is measured by the difference in height of the liquid in the U tube. g h A B A B AT ANY GIVEN POINT IN A STATIONARY LIQUID, THE PRESSURE IS THE SAME IN ALL DIRECTIONS. 3/2/2011 Physics 214 Fall

8 2B-05 Pressure Forces in Liquids What happens as the submerged cylinder filled with air is filled with water? An open ended cylinder kept shut by liquid pressure There are two forces acting on the plate. It s weight down and PA up. When PA exceeds the weight the cylinder stays intact Air PA In this situation the plate has to now support the weight of the water and when the weight of the water plus plate exceeds PA the cylinder opens Water PA THE LIQUID PRESSURE DEPENDS ONLY ON DEPTH P = ρgh. THE UPWARD FORCE DEPENDS ON THE AREA F = PA 3/2/2011 Physics 214 Fall

9 2B-08 Buoyant Force Compare the Buoyant Force between two cylinders of equal volume and different mass. Which object experiences the greater buoyant force, the heavier one or lighter one? T F B T Scale reads tension in cord: T = Mg F B Mg = F B + T Mg Mg We find F b to be exactly equal for both masses BUOYANT FORCE DOES NOT DEPEND ON THE MATERIAL OF THE OBJECT DISPLACING THE FLUID. THE BUOYANT FORCE DEPENDS ONLY ON THE VOLUME OF FLUID DISPLACED. 3/2/2011 Physics 214 Fall

10 2B-09 Archimedes I What happens to the reading on the upper scale when the block is lowered into the beaker of water? F B T Mg The fluid exerts a buoyant force on the block, which reduces the tension on the cord. The reading on the scale is lowered. T = Mg F B Should anything happen to the reading on the lower scale? Since the fluid exerts a force on the block, the block exerts an EQUAL and OPPOSITE force on the fluid. EVEN THOUGH THE BLOCK DOES NOT TOUCH THE LOWER SCALE, THE FORCE ON THE FLUID DUE TO THE BLOCK IS TRANSMITTED TO THE SCALE. THE REDUCTION IN READING ON THE UPPER SCALE IS EXACTLY EQUAL TO THE INCREASE IN READING ON THE LOWER SCALE. IF THE CONTAINER WAS FULL SO THAT WHEN THE BLOCK WAS INSERTED THE VOLUME THE BLOCK DISPLACED SPILLS OUT OF THE CONTAINER THEN THE BOTTOM SCALE WOULD NOT CHANGE. 3/2/2011 Physics 214 Fall

11 Quiz: Boat displaces 2.5 m 3 of water. Density of water H2O = 1000 kg/m 3. What is the mass of water displaced? What is the buoyant force? A). Mass = 2500 kg, buoyant force = 24500N B). Mass = 250 kg, buoyant force = 2450N C). Mass = 25 kg, buoyant force = 245N D). Mass = 2500 kg, buoyant force = 2450N E). Mass = 2500 kg, buoyant force = 245N Mass of fluid displaced (m FD ) = volume x density of fluid. M FD = V FD H2O = (2.5 m 3 )(1000 kg/m 3 ) = 2500 kg F b = W FD Buoyant force equals weight of fluid displaced. F b = W FD = m FD g = (2500 kg)(9.8 m/s 2 ) = N 11

Rank in order, from largest to smallest, the magnitudes of the 3 forces required to balance the masses in the Figure. The masses are in kilograms.

Rank in order, from largest to smallest, the magnitudes of the 3 forces required to balance the masses in the Figure. The masses are in kilograms. Rank in order, from largest to smallest, the magnitudes of the 3 forces required to balance the masses in the Figure. The masses are in kilograms. A. F 1 = F 2 = F 3 B. F 3 > F 2 > F 1 C. F 3 > F 1 > F

More information

Worksheet for Exploration 14.1: Floating and Density

Worksheet for Exploration 14.1: Floating and Density Worksheet for Exploration 14.1: Floating and Density How can a boat made out of a material more dense than water float? The block has a mass of 0.185 kg (position is given in centimeters). If this block

More information

Chapter 9: The Behavior of Fluids

Chapter 9: The Behavior of Fluids Chapter 9: The Behavior of Fluids 1. Archimedes Principle states that A. the pressure in a fluid is directly related to the depth below the surface of the fluid. B. an object immersed in a fluid is buoyed

More information

Chapter 14 - Fluids. -Archimedes, On Floating Bodies. David J. Starling Penn State Hazleton PHYS 213. Chapter 14 - Fluids. Objectives (Ch 14)

Chapter 14 - Fluids. -Archimedes, On Floating Bodies. David J. Starling Penn State Hazleton PHYS 213. Chapter 14 - Fluids. Objectives (Ch 14) Any solid lighter than a fluid will, if placed in the fluid, be so far immersed that the weight of the solid will be equal to the weight of the fluid displaced. -Archimedes, On Floating Bodies David J.

More information

Assignment 1 SOLUTIONS

Assignment 1 SOLUTIONS Assignment 1 SOLUTIONS 1. 18k Gold The overall density is the total mass divided by the total volume, so let s think about the volume fo 1 gram of 18k gold, which I ll call V 1g 18k. The volume 1 gm of

More information

13.3 Buoyancy. Buoyant Force

13.3 Buoyancy. Buoyant Force The forces from pressure acting on the bottom of this golf ball are greater than those on the top. This produces a net force called the buoyant force that acts upward on the ball. Buoyant Force What is

More information

Archimedes Principle

Archimedes Principle rev 12/2016 Archimedes Principle Equipment Qty Item Parts Number 1 Force Sensor, Economy CI-6746 1 Lab Jack SE-9373 1 Beaker SE-7288 1 250 ml Graduated Cylinder 1 Large Rod ME-8738 1 Small Rod ME-8988

More information

Buoyancy and Archimedes Principle. Buoyancy and Archimedes Principle Assume block is in equilibrium.

Buoyancy and Archimedes Principle. Buoyancy and Archimedes Principle Assume block is in equilibrium. Assume block is in equilibrium. Then upward forces must equal downward forces. Upward force: pressure from fluid Downward force: atmospheric pressure plus weight Therefore In this case, the object is less

More information

Laboratory 11. Fluid Statics, Pressure, and Buoyant Forces

Laboratory 11. Fluid Statics, Pressure, and Buoyant Forces Laboratory 11 Fluid Statics, Pressure, and Buoyant Forces I. Introduction In this exercise we will investigate some properties of non-moving fluids and the forces they exert on objects immersed in them.

More information

CHAPTER 3: FORCES AND PRESSURE

CHAPTER 3: FORCES AND PRESSURE CHAPTER 3: FORCES AND PRESSURE 3.1 UNDERSTANDING PRESSURE 1. The pressure acting on a surface is defined as.. force per unit. area on the surface. 2. Pressure, P = F A 3. Unit for pressure is. Nm -2 or

More information

Name Partner Date Class

Name Partner Date Class Name Partner Date Class FLUIDS Part 1: Archimedes' Principle Equipment: Dial-O-Gram balance, small beaker (150-250ml), metal specimen, string, calipers. Object: To find the density of an object using Archimedes'

More information

Clicker Questions Chapter 10

Clicker Questions Chapter 10 Clicker Questions Chapter 10 2010 Pearson Education, Inc. Essential College Physics Rex/Wolfson Question 10.1 Density If one material has a higher density than another, does this mean that the molecules

More information

AP2 Fluids. Kinetic Energy (A) stays the same stays the same (B) increases increases (C) stays the same increases (D) increases stays the same

AP2 Fluids. Kinetic Energy (A) stays the same stays the same (B) increases increases (C) stays the same increases (D) increases stays the same 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 that

More information

Three Methods for Calculating the Buoyant Force Gleue: Physics

Three Methods for Calculating the Buoyant Force Gleue: Physics Three Methods for Calculating the Buoyant Force Gleue: Physics Name Hr. The Buoyant Force (F b ) is the apparent loss of weight for an object submerged in a fluid. For example if you have an object immersed

More information

Physics 181- Summer 2011 - Experiment #8 1 Experiment #8, Measurement of Density and Archimedes' Principle

Physics 181- Summer 2011 - Experiment #8 1 Experiment #8, Measurement of Density and Archimedes' Principle Physics 181- Summer 2011 - Experiment #8 1 Experiment #8, Measurement of Density and Archimedes' Principle 1 Purpose 1. To determine the density of a fluid, such as water, by measurement of its mass when

More information

Lecture 13 Mass Density (Chapter 12) Pressure Buoyant Force

Lecture 13 Mass Density (Chapter 12) Pressure Buoyant Force Lecture 13 Mass Density (Chapter 12) Pressure Buoyant Force (Chap. 13) Density The (mass) density of a material is its mass M per unit volume V: The densities of most liquids and solids vary slightly with

More information

Archimedes. F b (Buoyant Force) DEMO. Identical Size Boxes Which has larger F B. Which is heavier. styrofoam (1 cm 3 ) steel ( 1 cm 3 )

Archimedes. F b (Buoyant Force) DEMO. Identical Size Boxes Which has larger F B. Which is heavier. styrofoam (1 cm 3 ) steel ( 1 cm 3 ) Fluids Density 1 F b (Buoyant Force) DEMO Archimedes Identical Size Boxes Which has larger F B Which is heavier styrofoam (1 cm 3 ) steel ( 1 cm 3 ) steel ( 1 cm 3 ) styrofoam (1 cm 3 ) 2 Finding the Weight

More information

Grade 8 Science Chapter 9 Notes

Grade 8 Science Chapter 9 Notes Grade 8 Science Chapter 9 Notes Force Force - Anything that causes a change in the motion of an object. - usually a push or a pull. - the unit for force is the Newton (N). Balanced Forces - forces that

More information

General Physics (PHY 2130)

General Physics (PHY 2130) General Physics (PHY 30) Lecture 3 Solids and fluids buoyant force Archimedes principle Fluids in motion http://www.physics.wayne.edu/~apetrov/phy30/ Lightning Review Last lecture:. Solids and fluids different

More information

Forces in Fluids. Objectives Describe how fluids exert pressure. Explain the relationship between fluid pressure and buoyant force.

Forces in Fluids. Objectives Describe how fluids exert pressure. Explain the relationship between fluid pressure and buoyant force. Forces in Fluids Objectives Describe how fluids exert pressure. Explain the relationship between fluid pressure and buoyant force. Describe the relationship between pressure and fluid speed. I. Fluids

More information

Fluids: Liquids vs. Gases

Fluids: Liquids vs. Gases FLUID MECHANICS Fluids: Liquids vs. Gases Chemical bonds can break when heated Leaving individual molecules free to roam randomly Liquids: Volume held constant due to surface tension So density (mass /

More information

Physics Principles of Physics

Physics Principles of Physics Physics 1408-002 Principles of Physics Lecture 21 Chapter 13 April 2, 2009 Sung-Won Lee Sungwon.Lee@ttu.edu Announcement I Lecture note is on the web Handout (6 slides/page) http://highenergy.phys.ttu.edu/~slee/1408/

More information

Density and Buoyant Force

Density and Buoyant Force Density_and_Buoyant_Force_6c.docx Density and Buoyant Force An exploration of the relationships between weight, density, and buoyant force. 1.1 EXPERIMENTAL GOAL 1 OBJECTIVES Students will use Archimedes'

More information

Write True or False in the space provided.

Write True or False in the space provided. CP Physics -- Exam #7 Practice Name: _ Class: Date: Write True or False in the space provided. 1) Pressure at the bottom of a lake depends on the weight density of the lake water and on the volume of the

More information

Molecules in a Liquid

Molecules in a Liquid LIQUIDS Molecules in a Liquid Chemical bonds can break when heated Leaving individual molecules free to roam Liquids: no large-scale structure Molecules roughly confined by a crowd of other molecules Molecules

More information

Buoyant Force and Archimedes Principle

Buoyant Force and Archimedes Principle Buoyant Force and Archimedes Principle Predict the behavior of fluids as a result of properties including viscosity and density Demonstrate why objects sink or float Apply Archimedes Principle by measuring

More information

Newton s Third Law: A Verification with Buoyancy Forces

Newton s Third Law: A Verification with Buoyancy Forces Newton s Third Law: A Verification with Buoyancy Forces Barry Feierman - April 2013 SEPS/AAPT Drexel University Newton s Third Law is the law of interaction. For every force that acts on one object, there

More information

Density. Part 1: What is Density?

Density. Part 1: What is Density? Density Part 1: What is Density? Starter Activity Which is heavier, steel or wood? Density We can use a number to describe how heavy something is for its size. Density is the mass per unit of volume. To

More information

Pressure In A Fluid. GE Define fluid in your own words. 2. Is a liquid a fluid? Is a gas a fluid? Explain your reasoning.

Pressure In A Fluid. GE Define fluid in your own words. 2. Is a liquid a fluid? Is a gas a fluid? Explain your reasoning. HPP Activity 38v1 Pressure In A Fluid Note that this unit contains the word "fluid" in the title. Let us carry on by examining the relationship between pressure and fluids. Exploration GE 1. 1. Define

More information

Fluids: Liquids & Gases

Fluids: Liquids & Gases Chapter 7: Fluids Fluids: Liquids & Gases Fluids are substances that are free to flow. Atoms and molecules are free to move. They take the shape of their containers. Cannot withstand or exert shearing

More information

Lab 8: Buoyancy and Archimedes Principle

Lab 8: Buoyancy and Archimedes Principle Description Lab 8: Buoyancy and Archimedes Principle In this lab, you will explore the force that displacing a fluid (liquid or gas) will exert on the body displacing the fluid. You will study how the

More information

Chapter 13: LIQUIDS. Lecture Part 1-2. Armen Kocharian Pearson Education, Inc.

Chapter 13: LIQUIDS. Lecture Part 1-2. Armen Kocharian Pearson Education, Inc. Chapter 13: LIQUIDS Lecture Part 1-2 Armen Kocharian Objectives: Pressure Pressure in a Liquid Buoyancy in a Liquid Archimedes Principle What Makes an Object Sink or Float The force per unit area that

More information

PSI Algebra Based Physics Fluids Multiple Choice Problems

PSI Algebra Based Physics Fluids Multiple Choice Problems PSI Algebra Based Physics Fluids Multiple Choice Problems 1. Two substances A with a density 2000 kg/m 3 and B with a density 3000 kg/m 3 are selected for an experiment. If the experiment requires equal

More information

Section 2 Buoyancy and Density

Section 2 Buoyancy and Density Section 2 Buoyancy and Density Key Concept Buoyant force and density affect whether an object will float or sink in a fluid. What You Will Learn All fluids exert an upward buoyant force on objects in the

More information

Fluids and Forces FYI

Fluids and Forces FYI Objectives Fluids and Forces Describe how fluids exert pressure. Analyze how atmospheric pressure varies with depth. Explain how depth and density affect water pressure. Give examples of fluids flowing

More information

Forces. 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 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 information

Chapter 3. Table of Contents. Chapter 3. Objectives. Chapter 3. Kinetic Theory. Section 1 Matter and Energy. Section 2 Fluids

Chapter 3. Table of Contents. Chapter 3. Objectives. Chapter 3. Kinetic Theory. Section 1 Matter and Energy. Section 2 Fluids States of Matter Table of Contents Objectives Summarize the main points of the kinetic theory of matter. Describe how temperature relates to kinetic energy. Describe four common states of matter. List

More information

Chapter 13 Fluids. Copyright 2009 Pearson Education, Inc.

Chapter 13 Fluids. Copyright 2009 Pearson Education, Inc. Chapter 13 Fluids 13-1 Phases of Matter The three common phases of matter are solid, liquid, and gas. A solid has a definite shape and size. A liquid has a fixed volume but can be any shape. A gas can

More information

Physics 1114: Unit 6 Homework: Answers

Physics 1114: Unit 6 Homework: Answers Physics 1114: Unit 6 Homework: Answers Problem set 1 1. A rod 4.2 m long and 0.50 cm 2 in cross-sectional area is stretched 0.20 cm under a tension of 12,000 N. a) The stress is the Force (1.2 10 4 N)

More information

Mercury is poured into a U-tube as in Figure (14.18a). The left arm of the tube has crosssectional

Mercury is poured into a U-tube as in Figure (14.18a). The left arm of the tube has crosssectional Chapter 14 Fluid Mechanics. Solutions of Selected Problems 14.1 Problem 14.18 (In the text book) Mercury is poured into a U-tube as in Figure (14.18a). The left arm of the tube has crosssectional area

More information

Physics 11 (Fall 2012) Chapter 13: Fluids

Physics 11 (Fall 2012) Chapter 13: Fluids Physics 11 (Fall 2012) Chapter 13: Fluids "Keep in mind that neither success nor failure is ever final." Roger Ward Babson Our greatest glory is not in never failing, but in rising up every time we fail.

More information

Buoyant Force. Goals and Introduction

Buoyant Force. Goals and Introduction Buoyant Force Goals and Introduction When an object is placed in a fluid, it either floats or sinks. While the downward gravitational force, F g, still acts on the object, an object in a fluid is also

More information

17.3 Buoyancy of Fluids

17.3 Buoyancy of Fluids Have you ever noticed how easy it is to do a push-up to lift yourself up and out of a swimming pool? It s much easier than doing push-ups on land. That s because the water is exerting an upward force on

More information

Fluids flow conform to shape of container. Mass: mass density, Forces: Pressure Statics: Human body 50-75% water, live in a fluid (air)

Fluids flow conform to shape of container. Mass: mass density, Forces: Pressure Statics: Human body 50-75% water, live in a fluid (air) Chapter 11 - Fluids Fluids flow conform to shape of container liquids OR gas Mass: mass density, Forces: Pressure Statics: pressure, buoyant force Dynamics: motion speed, energy friction: viscosity Human

More information

Fig. 9: an immersed body in a fluid, experiences a force equal to the weight of the fluid it displaces.

Fig. 9: an immersed body in a fluid, experiences a force equal to the weight of the fluid it displaces. Buoyancy Archimedes s 1 st laws of buoyancy: A body immersed in a fluid experiences a vertical buoyant force equal to the weight of the fluid it displaces, see Fig. 9 and 10. Fig. 9: an immersed body in

More information

Gases. Macroscopic Properties. Petrucci, Harwood and Herring: Chapter 6

Gases. Macroscopic Properties. Petrucci, Harwood and Herring: Chapter 6 Gases Petrucci, Harwood and Herring: Chapter 6 CHEM 1000A 3.0 Gases 1 We will be looking at Macroscopic and Microscopic properties: Macroscopic Properties of bulk gases Observable Pressure, volume, mass,

More information

2 rad c. π rad d. 1 rad e. 2π rad

2 rad c. π rad d. 1 rad e. 2π rad Name: Class: Date: Exam 4--PHYS 101--F14 Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A wheel, initially at rest, rotates with a constant acceleration

More information

Described by Isaac Newton

Described by Isaac Newton Described by Isaac Newton States observed relationships between motion and forces 3 statements cover aspects of motion for single objects and for objects interacting with another object An object at rest

More information

Chapter 13 - Fluids w./ QuickCheck Questions

Chapter 13 - Fluids w./ QuickCheck Questions Chapter 13 - Fluids w./ QuickCheck Questions 2015 Pearson Education, Inc. Anastasia Ierides Department of Physics and Astronomy University of New Mexico November 12, 2015 Review of Last Time Energy transformations

More information

Name Block Date March 2007 Ch. 19 Liquids Notes

Name Block Date March 2007 Ch. 19 Liquids Notes Name Block Date March 2007 Ch. 19 Liquids Notes Mrs. Peck Objectives: 1. Describe what determines the pressure of a liquid at any point. 19.1 2. Explain the cause of a buoyant force on an immersed or submerged

More information

Density. Density is how concentrated or compact matter is.

Density. Density is how concentrated or compact matter is. Density Density is how concentrated or compact matter is. Packing snow into snowballs increases its density. You are squeezing large amounts of matter into small volumes of space. Equation for Density

More information

Physics 2101 S c e t c i cti n o 3 n 3 March 26th Announcements: Next Quiz on Next Quiz April

Physics 2101 S c e t c i cti n o 3 n 3 March 26th Announcements: Next Quiz on Next Quiz April Physics 2101 Section 3 March 26 th Announcements: Next Quiz on April 1 st Don t forget supl. HW #9 Cha. 14 today Class Website: http://www.phys.lsu.edu/classes/spring2010/phys2101-3/ http://www.phys.lsu.edu/~jzhang/teaching.html

More information

PHY 171. Homework 9 solutions. (Due by beginning of class on Thursday, March 8, 2012)

PHY 171. Homework 9 solutions. (Due by beginning of class on Thursday, March 8, 2012) PHY 171 Due by beginning of class on Thursday, March 8, 2012 Submit neat work, with answers or solutions clearly marked by the question number. Unstapled, untidy work will be charged a handling fee of

More information

Archimedes Principle. Biological Systems

Archimedes Principle. Biological Systems Archimedes Principle Introduction Many of the substances we encounter in our every day lives do not have rigid structure or form. Such substances are called fluids and can be divided into two categories:

More information

AP PHYSICS B 2009 SCORING GUIDELINES

AP PHYSICS B 2009 SCORING GUIDELINES AP PHYSICS B 2009 SCORING GUIDELINES General Notes About 2009 AP Physics Scoring Guidelines 1. The solutions contain the most common method of solving the free-response questions and the allocation of

More information

Fluids I. Density is a measure of how much matter is squeezed into a given space, that is, the amount of mass per unit volume.

Fluids I. Density is a measure of how much matter is squeezed into a given space, that is, the amount of mass per unit volume. Fluids I Level : Conceptual Physics Teacher : Kim 1. Density One of the properties of any substances (solids, liquids and gases) is the measure of how tightly the material is packed together. This property

More information

Kinetic Theory. Bellringer. Kinetic Theory, continued. Visual Concept: Kinetic Molecular Theory. States of Matter, continued.

Kinetic Theory. Bellringer. Kinetic Theory, continued. Visual Concept: Kinetic Molecular Theory. States of Matter, continued. Bellringer You are already familiar with the most common states of matter: solid, liquid, and gas. For example you can see solid ice and liquid water. You cannot see water vapor, but you can feel it in

More information

Fluids I. Level : Conceptual Physics/Physics I. Q1) Order the following materials from lowest to greatest according to their densities.

Fluids I. Level : Conceptual Physics/Physics I. Q1) Order the following materials from lowest to greatest according to their densities. Fluids I Level : Conceptual Physics/Physics I Teacher : Kim 1. Density One of the properties of any substances (solids, liquids and gases) is the measure of how tightly the material is packed together.

More information

Solution: The boat sinks until the weight of the additional water displaced equals the weight of the truck. Thus,

Solution: The boat sinks until the weight of the additional water displaced equals the weight of the truck. Thus, Problem1. A small ferry boat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.00 cm into the river. What is the weight of the truck? Solution: The boat

More information

oil liquid water water liquid Answer, Key Homework 2 David McIntyre 1

oil liquid water water liquid Answer, Key Homework 2 David McIntyre 1 Answer, Key Homework 2 David McIntyre 1 This print-out should have 14 questions, check that it is complete. Multiple-choice questions may continue on the next column or page: find all choices before making

More information

PHYS 1405 Conceptual Physics I Laboratory # 8 Density and Buoyancy. Investigation: How can we identify a substance by figuring out its density?

PHYS 1405 Conceptual Physics I Laboratory # 8 Density and Buoyancy. Investigation: How can we identify a substance by figuring out its density? PHYS 1405 Conceptual Physics I Laboratory # 8 Density and Buoyancy Investigation: How can we identify a substance by figuring out its density? What to measure: Volume, mass. Measuring devices: Calipers,

More information

Lab 9. Archimedes Principle and Applications. Upon successful completion of this exercise you will have...

Lab 9. Archimedes Principle and Applications. Upon successful completion of this exercise you will have... Lab 9 Archimedes Principle and Applications Objectives: Upon successful completion of this exercise you will have... 1.... utilized Archimedes principle to determine the density and specific gravity of

More information

Buoyant Force and Archimedes' Principle

Buoyant Force and Archimedes' Principle Buoyant Force and Archimedes' Principle Introduction: Buoyant forces keep Supertankers from sinking and party balloons floating. An object that is more dense than a liquid will sink in that liquid. If

More information

Newton s Laws and Archimedes s Principle

Newton s Laws and Archimedes s Principle Purpose: To determine the densities of four metal cubes through an understanding of Archimedes's Principle. Equipment: Hooked Metal Cubes (Aluminum, Steel, Lead and Brass) Hooked Mass Set Beam Balance

More information

Student Exploration: Archimedes Principle

Student Exploration: Archimedes Principle Name: Date: Student Exploration: Archimedes Principle Vocabulary: Archimedes principle, buoyant force, density, displace, mass, volume, weight Prior Knowledge Questions (Do these BEFORE using the Gizmo.)

More information

Concept Questions Archimedes Principle. 8.01t Nov 24, 2004

Concept Questions Archimedes Principle. 8.01t Nov 24, 2004 Concept Questions Archimedes Principle 8.01t Nov 24, 2004 Pascal s Law Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid and the walls of the containing vessel

More information

1206 Concepts in Physics. Monday, October 19th

1206 Concepts in Physics. Monday, October 19th 1206 Concepts in Physics Monday, October 19th Notes Problems with webpage over the weekend If this is not fixed by tonight, I will find another way to display the material Either webct or printouts The

More information

Name Class Date. F 2 2269 N A 1 88.12 cm 2 A 2 1221 cm 2 Unknown: Step 2: Write the equations for Pascal s principle and pressure, force, and area.

Name Class Date. F 2 2269 N A 1 88.12 cm 2 A 2 1221 cm 2 Unknown: Step 2: Write the equations for Pascal s principle and pressure, force, and area. Skills Worksheet Math Skills Pascal s Principle After you study each sample problem and solution, work out the practice problems on a separate sheet of paper. Write your answers in the spaces provided.

More information

Figure 1: The Net Force of the Fluid Acting on an Object Is the Buoyant Force

Figure 1: The Net Force of the Fluid Acting on an Object Is the Buoyant Force Buoyancy, Stability, and Ballast 1 Cornerstone Electronics Technology and Robotics III (Notes primarily from Underwater Robotics Science Design and Fabrication, an excellent book for the design, fabrication,

More information

Density and Archimedes Principle

Density and Archimedes Principle Density and Archimedes Principle Objectives: To understand the concept of density and its relationship to various materials. To understand and use Archimedes Principle. Equipment: Dial calipers, Graduated

More information

Archimedes' Principle

Archimedes' Principle Archimedes' Principle Introduction Archimedes' Principle states that the upward buoyant force exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the

More information

Simulating Microgravity with Buoyancy A Space School Lesson Plan

Simulating Microgravity with Buoyancy A Space School Lesson Plan ASTRONAUT TRAINING...UNDERWATER Simulating Microgravity with Buoyancy A Space School Lesson Plan by Bill Andrake, Swampscott Middle School Swampscott, Massachusetts Science Lesson: Buoyancy - Based on

More information

Activity P13: Buoyant Force (Force Sensor)

Activity P13: Buoyant Force (Force Sensor) Activity P13: Buoyant Force (Force Sensor) Equipment Needed Qty Equipment Needed Qty Economy Force Sensor (CI-6746) 1 Mass and Hanger Set (ME-9348) 1 Base and Support Rod (ME-9355) 1 Ruler, metric 1 Beaker,

More information

Buoyancy. Please Circle Your Lab day: M T W T F

Buoyancy. Please Circle Your Lab day: M T W T F Please Circle Your Lab day: M T W T F Name: Project #1: Show that the buoyant force (F B ) equals fluid gv object by first calculating fluid gv object, and then by measuring F B (indirectly) using the

More information

Processes of Science: Physics of Matter. Introduction to Buoyancy

Processes of Science: Physics of Matter. Introduction to Buoyancy Processes of Science: Physics of Matter Introduction to Buoyancy Introduction: You already know that it's easier to lift something heavy when it's underwater. Why is this? Because the water helps support

More information

3 FORCES AND PRESSURE

3 FORCES AND PRESSURE 3 FORCES AND PRESSURE 3.1 UNDERSTANDING PRESSURE 1. Define Pressure Pressure is force per unit area 2. State pressure s formula Pressure = Force Area 3. State relationship between pressure and area. F

More information

Physics 103 CQZ1 Solutions and Explanations. 1. All fluids are: A. gases. B. liquids. C. gases or liquids. D. non-metallic. E.

Physics 103 CQZ1 Solutions and Explanations. 1. All fluids are: A. gases. B. liquids. C. gases or liquids. D. non-metallic. E. Physics 03 CQZ Solutions and Explanations. All fluids are: A. gases B. liquids C. gases or liquids D. non-metallic E. transparent Matter is classified as solid, liquid, gas, and plasma. Gases adjust volume

More information

Physics 250 Laboratory: Buoyancy

Physics 250 Laboratory: Buoyancy Physics 250 Laboratory: (Fluids) Score: Section #: Name: Name: Name: Lab-Specific Goals: To learn about density and buoyancy through experimenting with these concepts. Equipment List: Graduated cylinder

More information

ANSWER KEY EXPERIMENT 5: ARCHIMEDES PRINCIPLE

ANSWER KEY EXPERIMENT 5: ARCHIMEDES PRINCIPLE ANSWER KEY EXPERIMENT 5: ARCHIMEDES PRINCIPLE OBJECTIVE To determine the buoyant force from Archimedes Principle. INFERENCE Archimedes` Principle states that When an object is immersed in a fluid (liquid

More information

Activity P13: Buoyant Force (Force Sensor)

Activity P13: Buoyant Force (Force Sensor) July 21 Buoyant Force 1 Activity P13: Buoyant Force (Force Sensor) Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win) Archimedes Principle P13 Buoyant Force.DS P18 Buoyant Force P18_BUOY.SWS

More information

a) the object's density. c) the submerged volume of the object. b) the mass of the object. d) the shape of the object.

a) the object's density. c) the submerged volume of the object. b) the mass of the object. d) the shape of the object. Multiple Choice Questions ( Buoyant force and floatability) 1. The buoyant force on an object is dependent on a) the object's density. c) the submerged volume of the object. b) the mass of the object.

More information

Buoyancy Test ProblagBL-^

Buoyancy Test ProblagBL-^ Buoyancy Test ProblagBL-^ (Fill in the brackets with: "is than," "is less than," or "."). 1. Three balls having the same volume are put into kerosene. Call the buoyancy exerted on each ball Fa, Fb, and

More information

Gas Laws. The kinetic theory of matter states that particles which make up all types of matter are in constant motion.

Gas Laws. The kinetic theory of matter states that particles which make up all types of matter are in constant motion. Name Period Gas Laws Kinetic energy is the energy of motion of molecules. Gas state of matter made up of tiny particles (atoms or molecules). Each atom or molecule is very far from other atoms or molecules.

More information

Chapter 15. FLUIDS. 15.1. What volume does 0.4 kg of alcohol occupy? What is the weight of this volume? m m 0.4 kg. ρ = = ; ρ = 5.

Chapter 15. FLUIDS. 15.1. What volume does 0.4 kg of alcohol occupy? What is the weight of this volume? m m 0.4 kg. ρ = = ; ρ = 5. Chapter 15. FLUIDS Density 15.1. What volume does 0.4 kg of alcohol occupy? What is the weight of this volume? m m 0.4 kg ρ = ; = = ; = 5.06 x 10-4 m ρ 790 kg/m W = D = ρg = 790 kg/m )(9.8 m/s )(5.06 x

More information

Physics 6B. Philip Lubin

Physics 6B. Philip Lubin Physics 6B Philip Lubin prof@deepspace.ucsb.edu http://www.deepspace.ucsb.edu/classes/physics-6b-spring-2015 Course Outline Text College Physics Freedman 2014 Cover Chap 11-13, 16-21 Chap 11- Fluid Chap

More information

Forces in Fluids (Chapter 13)

Forces in Fluids (Chapter 13) Forces in Fluids (Chapter 13) Outline/Information Questions/Review 1/19 I. Pressure = force distributed over a given area A. Formula = Force/ Area 1. increase force = increase in pressure (this is a direct

More information

F mg (10.1 kg)(9.80 m/s ) m

F mg (10.1 kg)(9.80 m/s ) m Week 9 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 information

Lab 11 Density and Buoyancy

Lab 11 Density and Buoyancy b Lab 11 Density and uoyancy What You Need To Know: Density A concept that you will be using frequently in today s lab is called density. Density is a measurement of an object s mass per unit volume of

More information

Fluids Quiz Science 8

Fluids Quiz Science 8 Fluids Quiz Science 8 Introduction to Fluids 1. What are fluids essential for? Industrial Processes 2. What devices use knowledge of fluids? Hydraulic and pneumatic devices and machines A Close-Up Look

More information

Gas Properties and Balloons & Buoyancy SI M Homework Answer K ey

Gas Properties and Balloons & Buoyancy SI M Homework Answer K ey Gas Properties and Balloons & Buoyancy SI M Homework Answer K ey 1) In class, we have been discussing how gases behave and how we observe this behavior in our daily lives. In this homework assignment,

More information

Why Study Fluids? Solids and How They Respond to Forces. Solids and How They Respond to Forces. Crystal lattice structure:

Why Study Fluids? Solids and How They Respond to Forces. Solids and How They Respond to Forces. Crystal lattice structure: States of Matter Gas In a gas, the molecules are far apart and the forces between them are very small Solid In a solid, the molecules are very close together, and the form of the solid depends on the details

More information

25ml graduated. dish soap 100ml graduated cylinders. cylinders. Metric ruler with mm divisions. digital scale

25ml graduated. dish soap 100ml graduated cylinders. cylinders. Metric ruler with mm divisions. digital scale You are challenged to get your film canister to float while filled with the most weight you can. The film canisters will not be capped, so if they go under water at all, they will sink. You want to get

More information

Steven Burian Civil & Environmental Engineering March 27, 2015

Steven Burian Civil & Environmental Engineering March 27, 2015 Fundamentals of Engineering (FE) Exam Mechanics Steven Burian Civil & Environmental Engineering March 27, 2015 s and FE Morning ( Mechanics) A. Flow measurement 7% of FE Morning B. properties Session C.

More information

Density and Archimedes Principle

Density and Archimedes Principle Density and Archimedes Principle Objectives: To understand the concept of density and its relationship to various materials. To understand and use Archimedes Principle. Equipment: Dial calipers, Graduated

More information

Kinetic Energy. Kinetic Energy. Potential Energy

Kinetic Energy. Kinetic Energy. Potential Energy Kinetic Energy Kinetic energy is the energy associated with an object s motion. Doing work on an object increases its kinetic energy. Work done = change in kinetic energy KE = 1 2 mv 2 Kinetic Energy Negative

More information

Quick Peek. H Students will learn about. H Students will design and. Students will learn about density, buoyancy, and how submarines dive.

Quick Peek. H Students will learn about. H Students will design and. Students will learn about density, buoyancy, and how submarines dive. Quick Peek sink, float, Hover design a submarine! Students will learn about density, buoyancy, and how submarines dive. Suggested Grade Levels: 4 8 Illinois State Learning Goals science 11.A, 11.B, 12.D,

More information

Chapter 3. Flotation. ELEMENTARY HYDRAULICS National Certificate in Technology (Civil Engineering) Buoyancy

Chapter 3. Flotation. ELEMENTARY HYDRAULICS National Certificate in Technology (Civil Engineering) Buoyancy ELEMENTARY HYDRAULICS National Certificate in Technology (Civil Engineering) Chapter 3 Flotation Buoyancy Buoyancy arises from the fact that fluid pressure increases with depth and from the fact that the

More information

Activity P13: Buoyant Force (Force Sensor)

Activity P13: Buoyant Force (Force Sensor) Name Class Date Activity P13: Buoyant Force (Force Sensor) Concept DataStudio ScienceWorkshop (Mac) ScienceWorkshop (Win) Archimedes Principle P13 Buoyant Force.DS P18 Buoyant Force P18_BUOY.SWS Equipment

More information

AP Physics B Free Response Solutions

AP Physics B Free Response Solutions AP Physics B Free Response Solutions. (0 points) A sailboat at rest on a calm lake has its anchor dropped a distance of 4.0 m below the surface of the water. The anchor is suspended by a rope of negligible

More information