A.P. PHYSICS
Worksheet – Momentum
Name __________________
Date _________
Read all questions carefully. Organize and show work for full credit. Circle your answers. Place all
work on separate piece of paper. Staple your work to this sheet. Worksheet due _________________.
1.
A 9000 kg boxcar traveling at 20 m/s strikes a second car. The two stick together and move off
with a speed of 4.0 m/s. What is the mass of the second car?
2.
A 140 kg tackler moving at 3.0 m/s meets head on and tackles a 90 kg halfback moving at 6.5
m/s. What will be their mutual speed immediately after the collision?
3.
A 0.145 kg baseball pitched at 35.0 m/s is hit on a horizontal line drive straight back toward the
pitcher at 50.0 m/s. If the contact time between bat and ball is 5.00 x 10-4 s, calculate the average
force between ball and bat during contact.
4.
A 90 kg fullback is running 5.0 m/s and is stopped by a tackler in 1.0 s. Calculate (a) the original
momentum of the fullback, (b) the impulse imparted to the tackler, and (c) the average force
exerted on the tackler.
5.
A gun is fired vertically into a 2.40 kg block of wood at rest directly above it. If the bullet has a
mass of 22.0 g and a speed of 340 m/s, how high will the block rise into the air?
6.
A 10 g bullet traveling 400 m/s penetrates a 2.0 kg block of wood and emerges going 350 m/s. If
the block is stationary on a frictionless surface when hit, how fast does it move after the bullet
emerges?