Name: ______________________________________ Date: _______________________ Period: __________
Momentum Practice
Chapter: Momentum and Impulse
1) What are the units for…
a. Mass:
b. Velocity:
c. Moving inertia:
d. Momentum:
2) A truck and a skater travel down a hill at the same speed. Which of the two would be harder to stop
going down the hill? Why?
3) A truck and a skater travel down a hill. How could the two have the same momentum?
4) You are on the highway and your brakes stop working.
a. How would you want to stop your car, running into a brick wall (immediately stopping) or
running through a large haystack (stopping after a few seconds)? WHY?
b. Which of the two would have the greatest impulse?
5) When would you have a greater impulse; having your car hit a wall and stop moving, or having your car
hit a wall and bounce back at the same speed in the other direction? WHY?
6) A 5.20 kg cannonball is loaded into a 1430 kg cannon. Before the cannonball is fired, what is the
momentum of the cannon-cannonball system?
Name: ______________________________________ Date: _______________________ Period: __________
7) A 9.50 kg cannonball is loaded into a 1290 kg cannon. The cannon fires the cannonball at a velocity of
400. m/s. What is the resulting velocity of the cannon?
8) Two explosion carts (A & B) are set next to each other. Cart A has a mass of 12 kg and cart B has a mass
of 8kg.
a. What is the moving inertia of the system of carts A & B before the explosion?
b. When the spring is released between the carts, which cart will move faster? How do you know?
c. If cart B moved at a velocity of 3.5 m/s after the spring is released between the carts, what
would cart A’s velocity be?
d. What is the moving inertia of the system of carts A & B after the explosion?
9) Hover puck A (mass = .50 kg) has an initial velocity of -3.0 m/s. It then collides with a stationary hover
puck B (mass = 1.20 kg). If the two pucks stick together, how fast do they travel together?
Name: ______________________________________ Date: _______________________ Period: __________
10) Block A (mass = 12 kg) and block B (mass = 2.5 kg) are sliding across a frictionless surface and are about
to inelastically collide. Block A has an initial velocity of 1.4 m/s and block B has an initial velocity of -11.5
m/s.
a. Draw a picture of the scenario
b. Find the momentum of block A before the collision
c. Find the moving inertia of block B before the collision
d. What is the velocity of block A & B after they stick together?
e. What is the total momentum after the collision?