Question 1

A ball is rolling along the floor. It is rolling toward the east, and slowing down as it rolls. As the ball rolls,

Accepted Answer

A)  the net force on it is toward the west. 
B)  its velocity is toward the west. 
C)  Both of the above. 
D)  the net force on it is toward the east. 
E)  the net force on it is zero. 
A)  the net force on it is toward the west. 
B)  its velocity is toward the west. 
C)  Both of the above. 
D)  the net force on it is toward the east. 
E)  the net force on it is zero.

Question 2

Can two pool balls, both of them moving, have a total momentum of zero?

Accepted Answer

A)  No, because any moving object has momentum. 
B)  No, because they both have energy. 
C)  Yes, if they are moving in opposite directions, both with the same speed. 
D)  Yes, if they are both moving outward from the same point. 
E)  Yes, but only at the instant that they collide. 
A)  No, because any moving object has momentum. 
B)  No, because they both have energy. 
C)  Yes, if they are moving in opposite directions, both with the same speed. 
D)  Yes, if they are both moving outward from the same point. 
E)  Yes, but only at the instant that they collide.

Question 3

An auto moves at a steady 50 mph down a straight level road. Which of the following is the forward drive force on the auto?

Accepted Answer

A)  The backward push by the engine on the car. 
B)  The backward push by the drive tires on the road. 
C)  The drive force is actually zero in this example, because the auto is moving at a constant speed in a straight line. 
D)  The forward push by the road on the tires. 
E)  The forward push by the engine on the car. 
A)  The backward push by the engine on the car. 
B)  The backward push by the drive tires on the road. 
C)  The drive force is actually zero in this example, because the auto is moving at a constant speed in a straight line. 
D)  The forward push by the road on the tires. 
E)  The forward push by the engine on the car.

Question 4

A girl lifts a ball by means of a string attached to the ball. The string exerts a 20 newton force on the ball. The ball weighs 8 newtons. The net force on the ball is

Accepted Answer

A)  8 newtons. 
B)  zero. 
C)  28 newtons. 
D)  12 newtons. 
E)  20 newtons. 
A)  8 newtons. 
B)  zero. 
C)  28 newtons. 
D)  12 newtons. 
E)  20 newtons.

Question 5

A car weighing 5000 N is traveling along a straight level road powered by a forward drive force of 500 N. The force of air resistance is 200 N, and rolling resistance is 100 N. The net force on the car is

Accepted Answer

A)  zero. 
B)  300 N backward. 
C)  500 N forward. 
D)  5000 N downward. 
E)  200 N forward. 
A)  zero. 
B)  300 N backward. 
C)  500 N forward. 
D)  5000 N downward. 
E)  200 N forward.

Question 6

An auto weighing 3000 newtons has a forward drive force of 1000 newtons. Air resistance on the car is 100 newtons, and road resistance is 100 newtons. The auto moves along a straight level road. The net force on this auto is

Accepted Answer

A)  1000 newtons forward. 
B)  1200 newtons forward. 
C)  800 newtons backward. 
D)  800 newtons forward. 
E)  200 newtons backward. 
A)  1000 newtons forward. 
B)  1200 newtons forward. 
C)  800 newtons backward. 
D)  800 newtons forward. 
E)  200 newtons backward.

Question 7

Is any force exerted on you when you slow down while moving along a straight line?

Accepted Answer

A)  No, no force acts as long as you are slowing down. 
B)  Yes, there is a backward force on you, opposite to your direction of motion. 
C)  Yes, there is a sideways force on you. 
D)  Yes, there is a force on you but it is impossible to state the direction of this force because the question contains insufficient information. 
E)  Yes, there is a forward force on you, along your direction of motion. 
A)  No, no force acts as long as you are slowing down. 
B)  Yes, there is a backward force on you, opposite to your direction of motion. 
C)  Yes, there is a sideways force on you. 
D)  Yes, there is a force on you but it is impossible to state the direction of this force because the question contains insufficient information. 
E)  Yes, there is a forward force on you, along your direction of motion.

Question 8

A small car and a large truck collide head- on. During the collision, the small car experiences

Accepted Answer

A)  A much larger change in momentum than the truck. 
B)  A much larger acceleration than the truck. 
C)  A much larger force than the truck. 
D)  All of the above. 
E)  None of the above. 
A)  A much larger change in momentum than the truck. 
B)  A much larger acceleration than the truck. 
C)  A much larger force than the truck. 
D)  All of the above. 
E)  None of the above.

Question 9

An apple weighing 3 newtons hangs, motionless, from a tree branch. Newton's law of force pairs says that forces always come in pairs. One force acting on the apple is the apple's weight. What is the other force that forms a force pair with the weight?

Accepted Answer

A)  The apple pulling downward on the branch. 
B)  Earth pulling downward on the apple. 
C)  The apple pulling upward on Earth. 
D)  The branch pulling upward on the apple. 
A)  The apple pulling downward on the branch. 
B)  Earth pulling downward on the apple. 
C)  The apple pulling upward on Earth. 
D)  The branch pulling upward on the apple.

Question 10

An auto travels down a straight, level road at constant speed. One force that acts on the auto is

Accepted Answer

A)  gravity pushing upward on the auto. 
B)  the road pushing upward on the auto. 
C)  the auto pushing downward on the road. 
D)  the road pulling downward on the auto. 
E)  None of the above. 
A)  gravity pushing upward on the auto. 
B)  the road pushing upward on the auto. 
C)  the auto pushing downward on the road. 
D)  the road pulling downward on the auto. 
E)  None of the above.

Question 11

A one kilogram grapefruit weighs ten newtons. Suppose we take this grapefruit to the moon. The force of gravity on the grapefruit will then be

Accepted Answer

A)  less than one kilogram. 
B)  ten newtons. 
C)  less than ten newtons. 
D)  one kilogram. 
E)  None of the above. 
A)  less than one kilogram. 
B)  ten newtons. 
C)  less than ten newtons. 
D)  one kilogram. 
E)  None of the above.

Question 12

Forces of 8 N and 3 N act on an object. If the two forces act in opposite directions, the net force on the object is

Accepted Answer

A)  5 N. 
B)  11 N. 
C)  zero. 
D)  8 N. 
E)  impossible to determine. 
A)  5 N. 
B)  11 N. 
C)  zero. 
D)  8 N. 
E)  impossible to determine.

Question 13

Consider the force by a baseball against a player's glove while the player is catching a fastball. The law of force pairs says that this force is one of a pair of forces. The other member of this pair is

Accepted Answer

A)  the muscular force in the player's arms, i.e., the force by the player's muscles on the player's arm. 
B)  the player's grip on the glove, i.e., the force by the player's hand against the glove. 
C)  the frictional force by the ground on the player's shoes. 
D)  the weight of the ball. 
E)  the force by the glove on the ball. 
A)  the muscular force in the player's arms, i.e., the force by the player's muscles on the player's arm. 
B)  the player's grip on the glove, i.e., the force by the player's hand against the glove. 
C)  the frictional force by the ground on the player's shoes. 
D)  the weight of the ball. 
E)  the force by the glove on the ball.

Question 14

Any rock having a very large mass would necessarily

Accepted Answer

A)  move very slowly. 
B)  have a very large weight. 
C)  be very difficult to accelerate. 
D)  All of the above. 
E)  need to go on a diet. 
A)  move very slowly. 
B)  have a very large weight. 
C)  be very difficult to accelerate. 
D)  All of the above. 
E)  need to go on a diet.

Question 15

One force acting on your body right now is your weight. Which of the following is the best description of the other member of the "force pair" [of which your weight is one member]?

Accepted Answer

A)  The force by the surface of the seat pushing upward on your body. 
B)  The force by your body pushing downward on the seat. 
C)  The gravitational force by your body pushing downward on Earth. 
D)  The gravitational force by your body pulling upward on Earth. 
E)  The force by Earth pulling downward on your body. 
A)  The force by the surface of the seat pushing upward on your body. 
B)  The force by your body pushing downward on the seat. 
C)  The gravitational force by your body pushing downward on Earth. 
D)  The gravitational force by your body pulling upward on Earth. 
E)  The force by Earth pulling downward on your body.

Question 16

Would it be easier [i.e., would it require less rocket fuel] to lift a rocket off the moon's surface or off Earth's surface, and why?

Accepted Answer

A)  It would be equally difficult, because the rocket's mass would be the same on the moon as on Earth. 
B)  It would be impossible for the rocket to lift off of the moon, because there is no air on the moon. 
C)  It would be equally difficult, because the rocket's weight would be the same on the moon as on Earth. 
D)  It would be easier on the moon, because the rocket's weight would be less on the moon than it is on Earth. 
E)  It would be easier on the moon, because the rocket's mass would be less on the moon than it is on Earth. 
A)  It would be equally difficult, because the rocket's mass would be the same on the moon as on Earth. 
B)  It would be impossible for the rocket to lift off of the moon, because there is no air on the moon. 
C)  It would be equally difficult, because the rocket's weight would be the same on the moon as on Earth. 
D)  It would be easier on the moon, because the rocket's weight would be less on the moon than it is on Earth. 
E)  It would be easier on the moon, because the rocket's mass would be less on the moon than it is on Earth.

Question 17

Suppose that you are isolated and "floating" in outer space and that you hold a wooden block and a lead block, one in each hand, and that the two blocks look and feel identical. How could you tell which one is the lead block?

Accepted Answer

A)  Give each one a light tap with your finger; the one that accelerates the most is the lead block. 
B)  Give each one a light tap with your finger; the one that accelerates the least is the lead block. 
C)  Let go of them; the one that falls the fastest is the lead block. 
D)  None of the above methods could tell you which block is the lead block. 
A)  Give each one a light tap with your finger; the one that accelerates the most is the lead block. 
B)  Give each one a light tap with your finger; the one that accelerates the least is the lead block. 
C)  Let go of them; the one that falls the fastest is the lead block. 
D)  None of the above methods could tell you which block is the lead block.

Question 18

A gold dealer has three blocks of solid gold. He informs you that the first block would weigh one pound on the very massive planet Jupiter, that the second block would weigh one pound on the moon, and that the third block would weigh one pound on Earth. Which block of gold would make you the richest? NOTE: On Jupiter, you would weigh nearly three times your normal weight.

Accepted Answer

A)  Each of them would make you equally rich because they each contain the same amount of gold. 
B)  The third block. 
C)  The first block. 
D)  The second block. 
A)  Each of them would make you equally rich because they each contain the same amount of gold. 
B)  The third block. 
C)  The first block. 
D)  The second block.

Question 19

The force needed to maintain a body at constant speed in outer space [far from all outside influences] is equal to

Accepted Answer

A)  the force required to stop it. 
B)  the weight of the body. 
C)  zero. 
D)  the mass of the body. 
E)  None of the above. 
A)  the force required to stop it. 
B)  the weight of the body. 
C)  zero. 
D)  the mass of the body. 
E)  None of the above.

Question 20

A girl lifts a ball by means of a string attached to the ball. The string exerts a 30 newton force on the ball. The ball weighs 20 newtons and has a mass of 2 kilograms. The acceleration of the ball is

Accepted Answer

A)  25 m/s2. 
B)  15 m/s2. 
C)  5 m/s2. 
D)  zero. 
E)  10 m/s2. 
A)  25 m/s2. 
B)  15 m/s2. 
C)  5 m/s2. 
D)  zero. 
E)  10 m/s2.

A ball is rolling along the floor. It is rolling toward the east, and slowing down as it rolls. As the ball rolls,

Can two pool balls, both of them moving, have a total momentum of zero?

An auto moves at a steady 50 mph down a straight level road. Which of the following is the forward drive force on the auto?

A girl lifts a ball by means of a string attached to the ball. The string exerts a 20 newton force on the ball. The ball weighs 8 newtons. The net force on the ball is

A car weighing 5000 N is traveling along a straight level road powered by a forward drive force of 500 N. The force of air resistance is 200 N, and rolling resistance is 100 N. The net force on the car is

An auto weighing 3000 newtons has a forward drive force of 1000 newtons. Air resistance on the car is 100 newtons, and road resistance is 100 newtons. The auto moves along a straight level road. The net force on this auto is

Is any force exerted on you when you slow down while moving along a straight line?

A small car and a large truck collide head- on. During the collision, the small car experiences

An apple weighing 3 newtons hangs, motionless, from a tree branch. Newton's law of force pairs says that forces always come in pairs. One force acting on the apple is the apple's weight. What is the other force that forms a force pair with the weight?

An auto travels down a straight, level road at constant speed. One force that acts on the auto is

A one kilogram grapefruit weighs ten newtons. Suppose we take this grapefruit to the moon. The force of gravity on the grapefruit will then be

Forces of 8 N and 3 N act on an object. If the two forces act in opposite directions, the net force on the object is

Consider the force by a baseball against a player's glove while the player is catching a fastball. The law of force pairs says that this force is one of a pair of forces. The other member of this pair is

Any rock having a very large mass would necessarily

One force acting on your body right now is your weight. Which of the following is the best description of the other member of the "force pair" [of which your weight is one member]?

Would it be easier [i.e., would it require less rocket fuel] to lift a rocket off the moon's surface or off Earth's surface, and why?

Suppose that you are isolated and "floating" in outer space and that you hold a wooden block and a lead block, one in each hand, and that the two blocks look and feel identical. How could you tell which one is the lead block?

The force needed to maintain a body at constant speed in outer space [far from all outside influences] is equal to

A girl lifts a ball by means of a string attached to the ball. The string exerts a 30 newton force on the ball. The ball weighs 20 newtons and has a mass of 2 kilograms. The acceleration of the ball is

The Way of Science: Experience and Reason

Atoms: the Nature of Things

How Things Move: Galileo Asks the Right Questions

Newtons Universe

Conservation of Energy: You Cant Get Ahead

Second Law of Thermodynamics: and You Cant Even Break Even

Light and Electromagnetism

Electromagnetism Radiation and Global Climate Change

The Special Theory of Relativity

The General Theory of Relativity and the New Cosmology

The Quantum Idea

The Quantum Universe

The Nucleus and Radioactivity: an New Force

Fusion and Fission: and a New Energy

The Energy Challenge

Quantum Fields: Relativity Meets the Quantum

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Exam 4: Why Things Move As They Do

A ball is rolling along the floor. It is rolling toward the east, and slowing down as it rolls. As the ball rolls,

Can two pool balls, both of them moving, have a total momentum of zero?

An auto moves at a steady 50 mph down a straight level road. Which of the following is the forward drive force on the auto?

A girl lifts a ball by means of a string attached to the ball. The string exerts a 20 newton force on the ball. The ball weighs 8 newtons. The net force on the ball is

A car weighing 5000 N is traveling along a straight level road powered by a forward drive force of 500 N. The force of air resistance is 200 N, and rolling resistance is 100 N. The net force on the car is

An auto weighing 3000 newtons has a forward drive force of 1000 newtons. Air resistance on the car is 100 newtons, and road resistance is 100 newtons. The auto moves along a straight level road. The net force on this auto is

Is any force exerted on you when you slow down while moving along a straight line?

A small car and a large truck collide head- on. During the collision, the small car experiences

An apple weighing 3 newtons hangs, motionless, from a tree branch. Newton's law of force pairs says that forces always come in pairs. One force acting on the apple is the apple's weight. What is the other force that forms a force pair with the weight?

An auto travels down a straight, level road at constant speed. One force that acts on the auto is

A one kilogram grapefruit weighs ten newtons. Suppose we take this grapefruit to the moon. The force of gravity on the grapefruit will then be

Forces of 8 N and 3 N act on an object. If the two forces act in opposite directions, the net force on the object is

Consider the force by a baseball against a player's glove while the player is catching a fastball. The law of force pairs says that this force is one of a pair of forces. The other member of this pair is

Any rock having a very large mass would necessarily

One force acting on your body right now is your weight. Which of the following is the best description of the other member of the "force pair" [of which your weight is one member]?

Would it be easier [i.e., would it require less rocket fuel] to lift a rocket off the moon's surface or off Earth's surface, and why?

Suppose that you are isolated and "floating" in outer space and that you hold a wooden block and a lead block, one in each hand, and that the two blocks look and feel identical. How could you tell which one is the lead block?

The force needed to maintain a body at constant speed in outer space [far from all outside influences] is equal to

A girl lifts a ball by means of a string attached to the ball. The string exerts a 30 newton force on the ball. The ball weighs 20 newtons and has a mass of 2 kilograms. The acceleration of the ball is

The Way of Science: Experience and Reason

Atoms: the Nature of Things

How Things Move: Galileo Asks the Right Questions

Newtons Universe

Conservation of Energy: You Cant Get Ahead

Second Law of Thermodynamics: and You Cant Even Break Even

Light and Electromagnetism

Electromagnetism Radiation and Global Climate Change

The Special Theory of Relativity

The General Theory of Relativity and the New Cosmology

The Quantum Idea

The Quantum Universe

The Nucleus and Radioactivity: an New Force

Fusion and Fission: and a New Energy

The Energy Challenge

Quantum Fields: Relativity Meets the Quantum

Filters