Momentum is Conserved but Changes

mass times velocity equals:

p. 200: Momentum is __________ in collisions.

p. 200: ​ (a)   is ​ (b)   for objects pushing away from each other.

• momentum
• conserved
• weight
• distance
• liberated
• thrust
• propelled

Ball X has a mass of 5 kg. Ball Y is resting at the bottom of a hill and also has a mass of 5 kg. Ball X rolls down the hill at a speed of 12 m/s and comes to a stop when it collides with Ball Y. What is Ball Y's speed after the collision?

• 12 m/s

• 25 m/s

• 60 m/s

• 5 m/s

Ball X has a mass of 5 kg. Ball Y is resting at the bottom of a hill and also has a mass of 5 kg. Ball X rolls down the hill at a speed of 12 m/s and comes to a stop when it collides with Ball Y. What is Ball Y's momentum after the collision?

• 12 kg*m/s

• 25 kg*m/s

• 60 kg*m/s

• 5 kg*m/s

Ball X has a mass of 5 kg. It rolls down a hill at a speed of 12 m/s. What is Ball X's momentum as it rolls down the hill?

• 12 kg*m/s

• 25 kg*m/s

• 60 kg*m/s

• 5 kg*m/s

A 75 kg fisherman jumps from a dock into a 100 kg rowboat at rest on the west side of the dock. If the velocity of the fisherman is 1.5 m/s to the west as he leaves the dock, what is the final velocity of the fisherman and the boat?

• 0.64 m/s

• 22.8 m/s

• 1.25 m/s

• 0.25 m/s

A 75 kg fisherman jumps from a dock into a 100 kg rowboat at rest on the west side of the dock. If the velocity of the fisherman is 1.5 m/s to the west as he leaves the dock, what is the momentum of the fisherman and the boat after he jumps into it?

• 112.5 kg*m/s

• 22.8 kg*m/s

• 1.25 kg*m/s

• 64.4 kg*m/s

A 75 kg fisherman jumps from a dock with a speed of 1.5 m/s. How much momentum does she have?

• 112.5 kg*m/s

• 22.8 kg*m/s

• 1.25 kg*m/s

• 64.4 kg*m/s

If a 90 kg running back is running with the football at a speed of 8 m/s, how much momentum does he possess?

• 720 kg*m/s

• 98 kg*m/s

• 540 kg*m/s

• 920 kg*m/s