Free Printable Momentum Exam Review

1.

Two objects of the same mass travel in the same direction along a horizontal surface. Object X has a speed of 5 m/s and object Y has a speed of 2 m/s, as shown in the figure. After a period of time, object X collides with object Y. Consider the situation in which the objects collide but do not stick together. Which of the following predictions is true about the center of mass of the two-object system immediately after the collision?

a)

The center of mass does not move.

b)

The velocity of the center of mass does not change

c)

The velocity of the center of mass decreases in speed.

d)

The velocity of the center of mass increases in speed.

2.

Two objects of the same mass travel in the same direction along a horizontal surface. Object X has a speed of 5 m/s and object Y has a speed of 2 m/s, as shown in the figure. After a period of time, object X collides with object Y. Consider the situation in which object X has a speed of 2m/s and object Y has a speed of 5m/s after the collision takes place. After the collision, both objects travel in the same direction. Which of the following predictions must be true about how the momentum p→ of the two-object system and the kinetic energy K of the two-object system change from before the collision to after the collision?

a)

p: Remains constant K: Remains constant

b)

p: Remains constant K: Decreases

c)

p: Decreases K: Remains constant

d)

p: Decreases K: Decreases

3.

A student performs an experiment in which a 4kg object travels across a horizontal surface with an initial speed velocity of 6m/s and a 2kg object travels across a horizontal surface with an initial speed velocity of −3m/s. The objects travel toward each other and collide. Data collected from the experiment were used to create the velocity versus time graph shown that contains information about both objects before and after the collision. The positive direction is considered to be to the right. Which of the following statements are true regarding the data from the experiment?

a)

Both objects always travel in the positive direction during the experiment.

b)

Kinetic energy is conserved during the experiment.

c)

The position of the center of mass of the system remains constant during the experiment

d)

The velocity of the center of mass of the two-object system remains constant during the experiment

4.

a)

A

b)

B

c)

C

d)

D

5.

a)

A

b)

B

c)

C

d)

D

e)

E

6.

a)

A

b)

B

c)

C

d)

D

7.

a)

A

b)

B

c)

C

d)

D

8.

a)

A

b)

B

c)

C

d)

D

e)

E

9.

a)

A

b)

B

c)

C

d)

D

10.

a)

A

b)

B

c)

C

d)

D

Momentum Exam Review | AP Physics 1

Total questions: 10

Worksheet time: 5mins

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