Momentum Worksheet #2

Mr. Bosworth
General Physics
Momentum Worksheet #2
Name________________________________
Period_____
1. An 85.0 kg fisherman jumps from a dock into a 135 kg boat at rest. If the velocity of the fisherman as he leaves the
dock is 4.30 m/s west, what is the final velocity of the boat and fisherman together?
Answer_______________________
2. Each croquet ball in a set has a mass of .500 kg. The green ball, traveling at 12.0 m/s, strikes the blue ball, which is at
rest. Assume the balls slide on a frictionless surface and all the collisions are head-on. What is the speed of the blue
ball after the collision if the green ball stops after striking it?
Answer_______________________
3. Each croquet ball in a set has a mass of .500 kg. The green ball, traveling at 12.0 m/s, strikes the blue ball, which is at
rest. Assume the balls slide on a frictionless surface and all the collisions are head-on. What is the speed of the blue
ball after the collision if the green ball continues moving after the hit at 2.40 m/s in the same direction?
Answer_______________________
4. A boy on a 2.0 kg skateboard initially at rest tosses an 8.0 kg jug of water in the forward direction. If the jug has a
speed of 3.0 m/s forward and the boy and skateboard move in the opposite direction at .60 m/s, what is the mass of the
boy?
Answer_______________________
5. A 1850 kg luxury sedan is stopped at a traffic light and is struck from behind by a compact car with a mass of 975 kg.
The collision is inelastic and the compact car was moving 22.0 m/s north before the collision. What is the velocity of
the entangled mass after the collision?
Answer_________________________

6. A 1.50 X 10 4 kg railroad car is moving 7.00 m/s north and collides in an inelastic collision with a car of the same mass
moving 1.50 m/s in the same direction. What is the velocity of the cars after they are joined?
Answer_________________________
7. A 16.0 kg canoe is moving to the left at 12.5 m/s and makes an elastic head-on collision with a 14.0 kg raft moving to
the right at 16.0 m/s. After the collision, the raft moves to the left at 14.4 m/s. What is the velocity of the canoe after
the collision?
Answer_________________________
8. A 25.0 kg bumper car moving to the right at 5.00 m/s overtakes and collides elastically with a 35.0 kg bumper car
moving to the right. After the collision, the 25.0 kg car slows to 1.50 m/s to the right, and the 35.0 kg car moves at
4.50 m/s to the right. What was the velocity of the 35.0 kg car before the collision?
Answer_________________________
9. A 25.0 kg boy is sliding on a frictionless frozen lake at 5.00 m/s to the north when he is struck by a 1.10 kg snowball
moving at 15.0 m/s from the west. If the snowball sticks to him how fast and in what direction does the boy move
after the collision?
Answer_______________________
10. The snowball in #9 was thrown by a 35.0 kg mean-spirited female standing at rest on the same frictionless frozen lake.
How fast and in what direction did this girl move after throwing the snowball?
Answer_______________________