Question 1

An iron ball and wooden ball of the same size are dropped simultaneously from a tower and reach the ground at the same time.The iron ball has a greater

Accepted Answer

A) speed. 
B) acceleration. 
C) momentum. 
D) all of the above 
E) none of the above 
A) speed. 
B) acceleration. 
C) momentum. 
D) all of the above 
E) none of the above

Question 2

In terms of momentum,why is a drinking glass less likely to break if it falls on a carpeted floor than falling on a hard concrete floor?

Accepted Answer

The carpeted floor has more "give," whic

Question 3

A circus diver drops from a high pole into water far below.When he is half-way down

Accepted Answer

A) his potential energy is halved. 
B) he has gained an amount of kinetic energy equal to half his initial potential energy. 
C) his kinetic and potential energies are equal. 
D) all of the above 
E) none of the above 
A) his potential energy is halved. 
B) he has gained an amount of kinetic energy equal to half his initial potential energy. 
C) his kinetic and potential energies are equal. 
D) all of the above 
E) none of the above

Question 4

Which has greater kinetic energy: a car traveling at 30 km/h or another car of half the mass traveling at 60 km/h?

Accepted Answer

A) The 30-km/h car 
B) The 60-km/h car 
C) both have the same kinetic energy 
A) The 30-km/h car 
B) The 60-km/h car 
C) both have the same kinetic energy

Question 5

The force of a falling apple hitting the ground depends upon

Accepted Answer

A) the speed of the apple just before it hits the ground. 
B) the time of contact with the ground. 
C) whether or not the apple bounces. 
D) all of the above 
A) the speed of the apple just before it hits the ground. 
B) the time of contact with the ground. 
C) whether or not the apple bounces. 
D) all of the above

Question 6

Consider gliders that slide friction-free along a horizontal air track.Glider A has a mass of 1 kg,a speed of 1 m/s,and collides with glider B,which has a mass of 5 kg and is at rest.If they stick upon collision the combined-glider speed will be

Accepted Answer

A) 1/4 m/s. 
B) 1/5 m/s. 
C) 1/6 m/s. 
D) 1 m/s. 
E) none of the above 
A) 1/4 m/s. 
B) 1/5 m/s. 
C) 1/6 m/s. 
D) 1 m/s. 
E) none of the above

Question 7

An object in motion is an object that has

Accepted Answer

A) acceleration. 
B) impulse. 
C) momentum. 
D) all of the above 
E) none of the above 
A) acceleration. 
B) impulse. 
C) momentum. 
D) all of the above 
E) none of the above

Question 8

A bow is drawn so that it has 40 J of potential energy.When the arrow is fired its kinetic energy is ideally

Accepted Answer

A) less than 40 J. 
B) more than 40 J. 
C) 40 J. 
A) less than 40 J. 
B) more than 40 J. 
C) 40 J.

Question 9

A boulder is dropped onto mud and plows into it a certain distance.If it hits with three times as much speed,the distance it plows into the mud will likely be

Accepted Answer

A) the same distance. 
B) twice as deep. 
C) three times as deep. 
D) more than three times as deep. 
A) the same distance. 
B) twice as deep. 
C) three times as deep. 
D) more than three times as deep.

Question 10

A moving object has

Accepted Answer

A) speed. 
B) velocity. 
C) momentum. 
D) energy. 
E) all of the above 
A) speed. 
B) velocity. 
C) momentum. 
D) energy. 
E) all of the above

Question 11

Power is defined as the

Accepted Answer

A) force exerted divided by the time of exertion. 
B) force exerted multiplied by the distance moved. 
C) work done multiplied by the time to do the work. 
D) work done divided by the time to do the work. 
E) none of the above 
A) force exerted divided by the time of exertion. 
B) force exerted multiplied by the distance moved. 
C) work done multiplied by the time to do the work. 
D) work done divided by the time to do the work. 
E) none of the above

Question 12

A car moves 4 times as fast as another identical car.Compared with the slower car,the faster car has

Accepted Answer

A) 4 times the kinetic energy. 
B) 8 times the kinetic energy. 
C) 12 times the kinetic energy. 
D) 16 times the kinetic energy. 
A) 4 times the kinetic energy. 
B) 8 times the kinetic energy. 
C) 12 times the kinetic energy. 
D) 16 times the kinetic energy.

Question 13

Compared to a recoiling rifle,the bullet that is fired has a greater

Accepted Answer

A) momentum. 
B) kinetic energy. 
C) none of the above 
A) momentum. 
B) kinetic energy. 
C) none of the above

Question 14

Bronco's speed increases after he dives from a hovering helicopter.Relative to an observer in the helicopter Bronco's momentum

Accepted Answer

A) also increases. 
B) remains unchanged. 
C) decreases. 
A) also increases. 
B) remains unchanged. 
C) decreases.

Question 15

In raising a 5000-N piano with a pulley system,for every 1 m of rope pulled down,the piano rises 0.1 m.Ideally,this means the force needed to lift the piano is

Accepted Answer

A) 50 N. 
B) 500 N. 
C) 5000 N. 
D) not enough information 
A) 50 N. 
B) 500 N. 
C) 5000 N. 
D) not enough information

Question 16

The greater efficiency achieved with the curved blades of a Pelton wheel is due to

Accepted Answer

A) bouncing. 
B) greater time of water impact. 
C) rotational momentum. 
D) divided impulse. 
A) bouncing. 
B) greater time of water impact. 
C) rotational momentum. 
D) divided impulse.

Question 17

The most underlying feature of machines is

Accepted Answer

A) energy conservation. 
B) that energy input always equals energy output. 
C) that power input always equals power output. 
D) all of the above 
E) none of the above 
A) energy conservation. 
B) that energy input always equals energy output. 
C) that power input always equals power output. 
D) all of the above 
E) none of the above

Question 18

When the input piston of a hydraulic press is depressed 20 cm,the output piston is observed to move 1 cm.An input force of 1 N can raise no more than

Accepted Answer

A) 1 N. 
B) 10 N. 
C) 20 N. 
D) 21 N. 
A) 1 N. 
B) 10 N. 
C) 20 N. 
D) 21 N.

Question 19

A blob of material in outer space moves at 3 m/s when it collides and sticks to a half-as-massive blob initially at rest.Compared with the initial kinetic energy of the 3-m/s blob,the kinetic energy of the coupled blobs is

Accepted Answer

A) one-third. 
B) two-thirds. 
C) three-quarters. 
D) not enough information 
A) one-third. 
B) two-thirds. 
C) three-quarters. 
D) not enough information

Question 20

If you do work on an object in half the time,your power output is

Accepted Answer

A) half. 
B) the same. 
C) twice. 
A) half. 
B) the same. 
C) twice.

Exam 3: Momentum and Energy

An iron ball and wooden ball of the same size are dropped simultaneously from a tower and reach the ground at the same time.The iron ball has a greater

In terms of momentum,why is a drinking glass less likely to break if it falls on a carpeted floor than falling on a hard concrete floor?

A circus diver drops from a high pole into water far below.When he is half-way down

Which has greater kinetic energy: a car traveling at 30 km/h or another car of half the mass traveling at 60 km/h?

The force of a falling apple hitting the ground depends upon

Consider gliders that slide friction-free along a horizontal air track.Glider A has a mass of 1 kg,a speed of 1 m/s,and collides with glider B,which has a mass of 5 kg and is at rest.If they stick upon collision the combined-glider speed will be

An object in motion is an object that has

A bow is drawn so that it has 40 J of potential energy.When the arrow is fired its kinetic energy is ideally

A boulder is dropped onto mud and plows into it a certain distance.If it hits with three times as much speed,the distance it plows into the mud will likely be

A moving object has

Power is defined as the

A car moves 4 times as fast as another identical car.Compared with the slower car,the faster car has

Compared to a recoiling rifle,the bullet that is fired has a greater

Bronco's speed increases after he dives from a hovering helicopter.Relative to an observer in the helicopter Bronco's momentum

In raising a 5000-N piano with a pulley system,for every 1 m of rope pulled down,the piano rises 0.1 m.Ideally,this means the force needed to lift the piano is

The greater efficiency achieved with the curved blades of a Pelton wheel is due to

The most underlying feature of machines is

When the input piston of a hydraulic press is depressed 20 cm,the output piston is observed to move 1 cm.An input force of 1 N can raise no more than

A blob of material in outer space moves at 3 m/s when it collides and sticks to a half-as-massive blob initially at rest.Compared with the initial kinetic energy of the 3-m/s blob,the kinetic energy of the coupled blobs is

If you do work on an object in half the time,your power output is

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: The Nature of Science

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