Question 1

Whereas impulse involves the time that a force acts,work involves the

Accepted Answer

A) distance that a force acts. 
B) time and distance that a force acts. 
C) acceleration that a force produces. 
A) distance that a force acts. 
B) time and distance that a force acts. 
C) acceleration that a force produces.

Question 2

Suppose a miracle car has a 100% efficient engine and burns fuel having an energy content of 40 MJ/L.If all resistant forces on this car traveling at highway speeds is 1000 N,what is the overall limit in distance per liter driven on the highway?

Accepted Answer

A) 30 km 
B) 40 km 
C) 50 km 
D) more than 50 km 
E) not enough information 
A) 30 km 
B) 40 km 
C) 50 km 
D) more than 50 km 
E) not enough information

Question 3

A 1-kg chunk of putty moving at 1 m/s collides and sticks to a 5-kg bowling ball initially at rest.The bowling ball and putty move with a momentum of

Accepted Answer

A) 0 kg∙m/s. 
B) 1 kg∙m/s. 
C) 2 kg∙m/s. 
D) 5 kg∙m/s. 
E) more than 5 kg∙m/s. 
A) 0 kg∙m/s. 
B) 1 kg∙m/s. 
C) 2 kg∙m/s. 
D) 5 kg∙m/s. 
E) more than 5 kg∙m/s.

Question 4

Discuss how energy conservation applies to a swinging pendulum.Where is potential energy the most? Where is it the least? Where is kinetic energy the most? Where is it the least? Where is the pendulum bob moving fastest? Where is it the slowest?

Accepted Answer

The swinging pendulum has the most gravi

Question 5

Solar power is commonly used to produce

Accepted Answer

A) heat. 
B) electricity. 
C) both of these 
A) heat. 
B) electricity. 
C) both of these

Question 6

An open freight car rolls friction-free along a horizontal track in vertically pouring rain.As water accumulates in the car,its speed

Accepted Answer

A) increases. 
B) decreases. 
C) doesn't change. 
A) increases. 
B) decreases. 
C) doesn't change.

Question 7

It is correct to say that impulse is equal to

Accepted Answer

A) momentum. 
B) the change in momentum. 
C) the force multiplied by the distance the force acts. 
D) all of the above 
E) none of the above 
A) momentum. 
B) the change in momentum. 
C) the force multiplied by the distance the force acts. 
D) all of the above 
E) none of the above

Question 8

Which of the following has the largest momentum relative to Earth?

Accepted Answer

A) a tightrope walker crossing Niagara Falls 
B) a pickup truck speeding along a highway 
C) a Mack truck parked in a lot 
D) a dog running down the street 
A) a tightrope walker crossing Niagara Falls 
B) a pickup truck speeding along a highway 
C) a Mack truck parked in a lot 
D) a dog running down the street

Question 9

When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard,the speed of the skateboard

Accepted Answer

A) decreases. 
B) increases. 
C) neither decreases nor increases. 
A) decreases. 
B) increases. 
C) neither decreases nor increases.

Question 10

It takes 40 J to push a large crate 4 m across a floor.The force exerted on the crate is

Accepted Answer

A) 4 N. 
B) 10 N. 
C) 40 N. 
D) 160 N. 
E) 1600 N. 
A) 4 N. 
B) 10 N. 
C) 40 N. 
D) 160 N. 
E) 1600 N.

Question 11

A 5000-kg freight car crashes into a 10,000-kg freight car at rest.They couple upon collision and move with a speed of 2 m/s.What was the initial speed of the 5000-kg freight car?

Accepted Answer

A) 4 m/s 
B) 5 m/s 
C) 6 m/s 
D) 8 m/s 
E) none of the above 
A) 4 m/s 
B) 5 m/s 
C) 6 m/s 
D) 8 m/s 
E) none of the above

Question 12

A 1000-kg car and a 2000-kg car are hoisted the same vertical distance in a service station.Raising the more massive car requires

Accepted Answer

A) less work. 
B) as much work. 
C) twice as much work. 
D) four times as much work. 
E) more than four times as much work. 
A) less work. 
B) as much work. 
C) twice as much work. 
D) four times as much work. 
E) more than four times as much work.

Question 13

Strictly speaking,if any electrical device in an automobile is turned on (such as an air conditioner or even headlights),more fuel is consumed by the engine.This statement is

Accepted Answer

A) true. 
B) true only if the engine is running. 
C) always false. 
D) sometimes true,sometimes false. 
A) true. 
B) true only if the engine is running. 
C) always false. 
D) sometimes true,sometimes false.

Question 14

Which requires more work on the brakes of a car?

Accepted Answer

A) slowing down from 100 km/h to 70 km/h 
B) slowing down from 70 km/h to a stop 
C) equal amounts of work for either 
A) slowing down from 100 km/h to 70 km/h 
B) slowing down from 70 km/h to a stop 
C) equal amounts of work for either

Question 15

A ball rolling down an incline has its maximum potential energy at

Accepted Answer

A) the top. 
B) a quarter of the way down. 
C) half-way down. 
D) the bottom. 
A) the top. 
B) a quarter of the way down. 
C) half-way down. 
D) the bottom.

Question 16

A car that travels twice as fast as another car when braking to a stop will skid

Accepted Answer

A) twice as far. 
B) four times as far. 
C) depends on the mass of the cars. 
A) twice as far. 
B) four times as far. 
C) depends on the mass of the cars.

Question 17

Two identical arrows,one with twice the speed of the other are fired into a bale of hay.The faster arrow will penetrate the bale

Accepted Answer

A) the same distance as the slower arrow. 
B) twice as far as the slower arrow. 
C) four times as far as the slower arrow. 
D) more than four times as far as the slower arrow. 
E) none of the above 
A) the same distance as the slower arrow. 
B) twice as far as the slower arrow. 
C) four times as far as the slower arrow. 
D) more than four times as far as the slower arrow. 
E) none of the above

Question 18

Acrobat Bart at the circus drops vertically onto the end of a see-saw,with his partner Art equidistant from the fulcrum at the other end.Art is propelled straight upward a distance twice that of Bart's dropping distance.Neglecting inefficiencies we see

Accepted Answer

A) the masses of Art and Bart are equal. 
B) Art has half the mass of Bart. 
C) need more information 
A) the masses of Art and Bart are equal. 
B) Art has half the mass of Bart. 
C) need more information

Question 19

If you push an object twice as far while applying the same force,you do

Accepted Answer

A) twice as much work. 
B) four times as much work. 
C) the same amount of work. 
A) twice as much work. 
B) four times as much work. 
C) the same amount of work.

Question 20

When a bus brakes to a stop its kinetic energy transforms to

Accepted Answer

A) stopping energy. 
B) potential energy. 
C) energy of motion. 
D) energy of rest. 
E) heat. 
A) stopping energy. 
B) potential energy. 
C) energy of motion. 
D) energy of rest. 
E) heat.

Exam 3: Momentum and Energy

Whereas impulse involves the time that a force acts,work involves the

Suppose a miracle car has a 100% efficient engine and burns fuel having an energy content of 40 MJ/L.If all resistant forces on this car traveling at highway speeds is 1000 N,what is the overall limit in distance per liter driven on the highway?

A 1-kg chunk of putty moving at 1 m/s collides and sticks to a 5-kg bowling ball initially at rest.The bowling ball and putty move with a momentum of

Discuss how energy conservation applies to a swinging pendulum.Where is potential energy the most? Where is it the least? Where is kinetic energy the most? Where is it the least? Where is the pendulum bob moving fastest? Where is it the slowest?

Solar power is commonly used to produce

An open freight car rolls friction-free along a horizontal track in vertically pouring rain.As water accumulates in the car,its speed

It is correct to say that impulse is equal to

Which of the following has the largest momentum relative to Earth?

When Freddy Frog drops vertically from a tree onto a horizontally-moving skateboard,the speed of the skateboard

It takes 40 J to push a large crate 4 m across a floor.The force exerted on the crate is

A 5000-kg freight car crashes into a 10,000-kg freight car at rest.They couple upon collision and move with a speed of 2 m/s.What was the initial speed of the 5000-kg freight car?

A 1000-kg car and a 2000-kg car are hoisted the same vertical distance in a service station.Raising the more massive car requires

Strictly speaking,if any electrical device in an automobile is turned on (such as an air conditioner or even headlights),more fuel is consumed by the engine.This statement is

Which requires more work on the brakes of a car?

A ball rolling down an incline has its maximum potential energy at

A car that travels twice as fast as another car when braking to a stop will skid

Two identical arrows,one with twice the speed of the other are fired into a bale of hay.The faster arrow will penetrate the bale

Acrobat Bart at the circus drops vertically onto the end of a see-saw,with his partner Art equidistant from the fulcrum at the other end.Art is propelled straight upward a distance twice that of Bart's dropping distance.Neglecting inefficiencies we see

If you push an object twice as far while applying the same force,you do

When a bus brakes to a stop its kinetic energy transforms to

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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