This applet allows you to explore both elastic and inelastic collisions for carts of various masses. It also displays bar charts of momentum or one of several different graphs.
Bring a calculator (no mobile devices allowed) and
your prepared 8-½×11 reference sheet
6 true/false questions (12 pts)
6 multiple-choice questions (18 pts)
3 free-response questions, each with multiple parts (70 pts)
See study guide for topic list, also in Canvas Exam II module
walker4
A person pushes with 50 N of force to separate two canoes that are initially at rest.
If the person pushes for 1.20 s, find the magnitude of the momenta of each canoe after the push.
A. 24 kg·m/s
B. 60 kg·m/s
C. 41.7 kg·m/s
D. The masses are required to answer this question. Answer
gc6 ex7-4
A 5.0 kg rifle fires a 0.020 kg bullet at 620 m/s. What is the recoil speed of the rifle?
A. 2.5 m/s
B. 0.40 m/s
C. 0.080 m/s
D. 12.4 m/s Answer
PoP5 8.15
A 25,000 kg railcar moving at 4.00 m/s collides and couples together with three identical cars moving
in the same direction at 2.00 m/s. What energy is lost in the collision?
A. zero
B. 313 kJ
C. 50 kJ
D. 37.5 kJ Answer
PoP5 8.19
Block m1 = 5.00 kg is released from A and collides elastically with
m2 = 10.0 kg, initially at rest at B. To what height will m1
rise after the collision?
A. 0.556 m
B. 0.875 m
C. 1.67 m
D. 5.00 m Answer
PoP5 8.33
The brown 0.300-kg puck is struck by the blue 0.200-kg puck going 2.00 m/s in the x direction.
After the collision
v1f = 1.00 m/s and θ = 53.0°. What is
v2f?
A. 0.571 m/s
B. 0.882 m/s
C. 1.07 m/s
D. 1.40 m/s Answer
B. 60 kg·m/s
The change of momentum of each canoe equals the impulse that is
delivered. The impulse is the product of the force and the time interval, so
(50 N)(1.20 s) = 60 kg·m/s