AnswersPBCSD_Grade_Forgiveness_2003310_Physical Science_S1_2022Changes of State

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The chart shows masses and velocities of four objects.

Question illustration
A
W, X, Y, Z
B
Z, Y, X, W
C
Z, X, W, Y
D
Y, W, X, Z
2
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When someone throws a ball, the action force is the person pushing on the ball. What is the reaction force?

A
the ball pushing on the person
B
the ball pushing against air
C
the ball being pulled toward the ground
D
the ball being pulled away from the person
3

Objects 1 and 2 collide and stick together. Which best describes the momentum of the resulting single object?

A
It is less than the momentum of object 1 but greater than the momentum of object 2.
B
It is greater than the momentum of object 1 but less than the momentum of object 2.
C
It is equal to the momentum of object 1 minus the momentum of object 2.
D
It is equal to the momentum of object 1 plus the momentum of object 2.
4

Denise is riding her bike and falls to the ground. During the collision, she hits both grass and cement.

A
The grass did not exert a reaction force.
B
The grass did not exert an action force.
C
The grass shortens the time of the collision.
D
The grass extends the time of the collision.
5

The law of conservation of momentum states that, if left alone, what happens to the total momentum of two interacting objects that make up a system?

A
it increases over time
B
it remains the same
C
it eventually becomes zero
D
changes based on how they collide
6

A bowling ball collides with a pin and pushes the pin toward the right. Which describes the reaction force?

A
The pin pushes the bowling ball toward the right.
B
The pin pushes the bowling ball toward the left.
C
The bowling ball pulls the pin toward the right.
D
The bowling ball pulls the pin toward the left.
7

The chart show the masses and velocities of two colliding objects that stick together after a collision.

Question illustration
A
4,500 g · m/s
B
1,750 g · m/s
C
1,500 kg · m/s
D
3,000 kg · m/s
8

A NASA explorer spacecraft with a mass of 1,000 kg takes off in a positive direction from a stationary asteroid.If the velocity of the spacecraft is 250 m/s and the asteroid is pushed back –25 m/s, what is the mass of the asteroid? Assume there is no net force on the system.

A
100 kg
B
6,250 kg
C
10,000 kg
D
6,250,000 kg
9

Momentum is a measure of the ________ of an object.Which term accurately completes the sentence?

A
mass
B
motion
C
force
D
weight
10

The chart lists the masses of four balls that have the same momentum.

Question illustration
A
The green ball has a lower velocity than the purple ball.
B
The red ball has a greater velocity than the purple ball.
C
The yellow ball has a higher velocity than the green ball.
D
The red ball has a greater velocity than the green ball.

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