Momentum / Impulse HW 1

Momentum / Impulse HW 1 HW 3.6 1) A 2250 kg pickup truck has a velocity of 25 m/s in the positive x-direction. What is the momentum of the truck?

2) What velocity must a car with a mass of 1210 kg have in order to have the same momentum as the pickup truck?

3) A 18. kg child is riding a 6.0 kg bike with a velocity of 5.0 m/s in the positive x-direction.

a. What is the total momentum of the child and bike together?

b. What is the momentum of the child?

c. What is the momentum of the bike?

4) A 1400 kg car moving in the negative x-direction with a velocity of 15 m/s collides with a utility pole and is brought to rest in 0.30 sec. Find the magnitude of the force exerted on the car during the collision.

5) A 0.50 kg object is at rest. A 3.00 N force to the right acts on the object during a time interval of 1.50 sec. What is the velocity of the object at the end of this interval?

6) A boy stands at one end of a floating raft that is stationary relative to the shore. He then walks in a straight line to the opposite end of the raft, away from the shore.

a. Does the raft move? Explain your reasoning.

b. What is the total momentum of the boy and raft before the boy walks across?

c. What is the total momentum of the boy and raft after the boy walks across? Momentum / Impulse HW 1 HW 3.6

7) A 63.0 kg astronaut is on a spacewalk when the tether line to the shuttle breaks. The

astronaut throws their 10.0 kg O2 tank in a direction away from the shuttle at a velocity of 12.0 m/s. Assuming the astronaut is initially at rest, calculate the final velocity of the astronaut after throwing the tank.

8) A high speed camera photographs the head of a 215 g golf club traveling 55.0 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision the club travels at 42.0 m/s in the same direction as before. Use the COLM to find the velocity of the golf ball just after impact.