Question 1

A block of ice sliding down an incline has one-quarter its maximum potential energy

Accepted Answer

A) one-quarter from the top. 
B) one-quarter from the bottom. 
C) three-quarters the way down. 
D) need more information 
A) one-quarter from the top. 
B) one-quarter from the bottom. 
C) three-quarters the way down. 
D) need more information

Question 2

When an apple falls to the ground,momentum is transferred to the ground.The momentum absorbed by the ground is

Accepted Answer

A) negligible compared to the momentum of the apple. 
B) greater if the apple bounces. 
C) greater than that of the apple whether or not bouncing occurs. 
D) none of the above 
A) negligible compared to the momentum of the apple. 
B) greater if the apple bounces. 
C) greater than that of the apple whether or not bouncing occurs. 
D) none of the above

Question 3

A ball is projected into the air with 900 J of kinetic energy that is transformed to potential energy at the top of its trajectory.When it returns to its original level after encountering air resistance,its kinetic energy is

Accepted Answer

A) less than 900 J. 
B) more than 900 J. 
C) 900 J. 
D) not enough information 
A) less than 900 J. 
B) more than 900 J. 
C) 900 J. 
D) not enough information

Question 4

Two identical gliders slide toward each other on an air track.One glider moves at 1 m/s and the other glider moves at 2 m/s.They collide,stick,and move at

Accepted Answer

A) 1/2 m/s. 
B) 1/3 m/s. 
C) 1/6 m/s. 
D) 3/4 m/s. 
E) 1.5 m/s. 
A) 1/2 m/s. 
B) 1/3 m/s. 
C) 1/6 m/s. 
D) 3/4 m/s. 
E) 1.5 m/s.

Question 5

Which has the greater kinetic energy?

Accepted Answer

A) a car traveling at 30 km/h 
B) a car of half the mass traveling at 60 km/h 
C) both the same 
D) need more information 
A) a car traveling at 30 km/h 
B) a car of half the mass traveling at 60 km/h 
C) both the same 
D) need more information

Question 6

A 50-kg sack is lifted 2 m in the same time as a 25-kg sack is lifted 4 m.The power expended in raising the 50-kg sack compared to the power used to lift the 25-kg sack is

Accepted Answer

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

Question 7

What is produced by the process of electrolysis?

Accepted Answer

A) energy 
B) hydrogen and oxygen 
C) pure drinking water 
D) photovoltaic power 
A) energy 
B) hydrogen and oxygen 
C) pure drinking water 
D) photovoltaic power

Question 8

A karate chop is more effective if one's hand

Accepted Answer

A) follows through upon impact. 
B) bounces upon impact. 
C) extends the time upon impact. 
A) follows through upon impact. 
B) bounces upon impact. 
C) extends the time upon impact.

Question 9

A 2-kg rifle is horizontally suspended by a pair of strings so that recoil can be measured.The rifle fires a 0.001-kg bullet at a speed of 200 m/s.The recoil velocity of the rifle is about

Accepted Answer

A) 0.001 m/s. 
B) 0.01 m/s. 
C) 0.1 m/s. 
D) 1 m/s. 
E) none of the above 
A) 0.001 m/s. 
B) 0.01 m/s. 
C) 0.1 m/s. 
D) 1 m/s. 
E) none of the above

Question 10

If a monkey floating in outer space throws his hat away,the hat and the monkey will both move

Accepted Answer

A) away from each other,but at different speeds. 
B) away from each other at the same speed. 
C) a short distance and then slow down. 
D) a short distance and then gain speed. 
E) quickly to a stop. 
A) away from each other,but at different speeds. 
B) away from each other at the same speed. 
C) a short distance and then slow down. 
D) a short distance and then gain speed. 
E) quickly to a stop.

Question 11

A block of ice sliding down an incline has half its maximum kinetic energy

Accepted Answer

A) at the top. 
B) at the bottom. 
C) half-way down. 
D) need more information 
A) at the top. 
B) at the bottom. 
C) half-way down. 
D) need more information

Question 12

Work is done on an object when you lift it against gravity.How does this work relate to gravitational potential energy? If the lifted object is dropped,what becomes of this energy?

Accepted Answer

The work you do on the lifted object may

Question 13

Recoil is noticeable if we throw a heavy ball while standing on a skateboard.If instead we go through the throwing motion but hold onto the ball,without friction effects our net recoil will be

Accepted Answer

A) zero. 
B) the same as before. 
C) small,but noticeable. 
A) zero. 
B) the same as before. 
C) small,but noticeable.

Question 14

The ultimate source of energy from fossil fuels is the

Accepted Answer

A) Sun. 
B) radioactivity in Earth's interior. 
C) photosynthesis process. 
D) natural processes in Earth's interior. 
A) Sun. 
B) radioactivity in Earth's interior. 
C) photosynthesis process. 
D) natural processes in Earth's interior.

Question 15

A common pulley acts similar to a

Accepted Answer

A) hydraulic press. 
B) gear. 
C) common lever. 
D) tension producer. 
A) hydraulic press. 
B) gear. 
C) common lever. 
D) tension producer.

Question 16

The bob of a simple pendulum has its maximum kinetic energy at the

Accepted Answer

A) top of its swing. 
B) bottom of its swing. 
C) midpoint between top and bottom of its swing. 
D) at all points along its path of swing. 
A) top of its swing. 
B) bottom of its swing. 
C) midpoint between top and bottom of its swing. 
D) at all points along its path of swing.

Question 17

A 0.5-kg blob of clay moving at 2.0 m/s slams into a 4.0-kg blob of clay at rest.The speed of the two blobs stuck together after colliding is about

Accepted Answer

A) 1.1 m/s. 
B) 1.5 m/s. 
C) 2.5 m/s. 
D) none of the above 
A) 1.1 m/s. 
B) 1.5 m/s. 
C) 2.5 m/s. 
D) none of the above

Question 18

From the edge of a roof you throw a snowball downward that strikes the ground with 100 J of kinetic energy.Then you throw a second snowball upward with the same initial speed,and this too falls to the ground.Neglecting air resistance,the second snowball hits the ground with a kinetic energy of

Accepted Answer

A) less than 100 J. 
B) 100 J. 
C) 200 J. 
D) more than 200 J. 
E) none of the above 
A) less than 100 J. 
B) 100 J. 
C) 200 J. 
D) more than 200 J. 
E) none of the above

Question 19

Can an object have mechanical energy without having momentum? Can an object have momentum without having mechanical energy? Explain.

Accepted Answer

An object can have potential energy with

Question 20

Which of these two collisions is more damaging; driving into a concrete wall with no "give," or colliding head-on with an identical car moving toward you at your same speed?

Accepted Answer

A) collision with the car 
B) collision with the wall 
C) both the same 
A) collision with the car 
B) collision with the wall 
C) both the same

Exam 3: Momentum and Energy

A block of ice sliding down an incline has one-quarter its maximum potential energy

When an apple falls to the ground,momentum is transferred to the ground.The momentum absorbed by the ground is

A ball is projected into the air with 900 J of kinetic energy that is transformed to potential energy at the top of its trajectory.When it returns to its original level after encountering air resistance,its kinetic energy is

Two identical gliders slide toward each other on an air track.One glider moves at 1 m/s and the other glider moves at 2 m/s.They collide,stick,and move at

Which has the greater kinetic energy?

A 50-kg sack is lifted 2 m in the same time as a 25-kg sack is lifted 4 m.The power expended in raising the 50-kg sack compared to the power used to lift the 25-kg sack is

What is produced by the process of electrolysis?

A karate chop is more effective if one's hand

A 2-kg rifle is horizontally suspended by a pair of strings so that recoil can be measured.The rifle fires a 0.001-kg bullet at a speed of 200 m/s.The recoil velocity of the rifle is about

If a monkey floating in outer space throws his hat away,the hat and the monkey will both move

A block of ice sliding down an incline has half its maximum kinetic energy

Work is done on an object when you lift it against gravity.How does this work relate to gravitational potential energy? If the lifted object is dropped,what becomes of this energy?

Recoil is noticeable if we throw a heavy ball while standing on a skateboard.If instead we go through the throwing motion but hold onto the ball,without friction effects our net recoil will be

The ultimate source of energy from fossil fuels is the

A common pulley acts similar to a

The bob of a simple pendulum has its maximum kinetic energy at the

A 0.5-kg blob of clay moving at 2.0 m/s slams into a 4.0-kg blob of clay at rest.The speed of the two blobs stuck together after colliding is about

From the edge of a roof you throw a snowball downward that strikes the ground with 100 J of kinetic energy.Then you throw a second snowball upward with the same initial speed,and this too falls to the ground.Neglecting air resistance,the second snowball hits the ground with a kinetic energy of

Can an object have mechanical energy without having momentum? Can an object have momentum without having mechanical energy? Explain.

Which of these two collisions is more damaging; driving into a concrete wall with no "give," or colliding head-on with an identical car moving toward you at your same speed?

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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