Momentum

Question 1

A car has a momentum of 20,000 kg • m/s. What would the car’s momentum be if its velocity doubles?

Revolt · Accepted Answer

40,000 kg • m/s

Question 2

When someone throws a ball, the action force is the person pushing on the ball. What is the reaction force?

Revolt · Accepted Answer

the ball pushing on the person

Question 3

According to Newton’s third law of motion, which are equal?

Revolt · Accepted Answer

action force and reaction force

Question 4

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

Revolt · Accepted Answer

The grass extends the time of the collision.

Question 5

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

Revolt · Accepted Answer

The red ball has a greater velocity than the purple ball.

Question 6

Two carts collide and bounce apart. Cart 1 had a momentum of –6 kg • m/s before the collision. Cart 2 had a momentum of 10 kg • m/s before the collision.

Revolt · Accepted Answer

4 kg • m/s

Question 7

The chart shows masses and velocities of four objects.

Revolt · Accepted Answer

Z, X, W, Y

Question 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.

Revolt · Accepted Answer

10,000 kg

Question 9

The diagram shows two balls before they collide.

Revolt · Accepted Answer

0.2 kg • m/s

Question 10

What is the momentum of a 5 kg object that has a velocity of 1.2 m/s?

Revolt · Accepted Answer

6.0 kg • m/s

Momentum Answers

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