Assume that the balls have equal
mass
.
3.05 m/s, 346.56
o
4)
A red ball traveling at 4m/s at an angle of 20° above horizontal collides elastically with a green ball,
with twice the mass of the red ball, traveling at 3m/s at an angle of 35° below horizontal.
After the
collision, the red ball is traveling at angle of 10° below horizontal and the green ball is traveling at an
angle of 5° above the horizontal.
Assume both balls are traveling in the positive x direction the whole
time.
What is the final velocity of each ball?
1) A 1,000kg car is traveling east at 20m/s when it perfectly inelestically collides with a northbound
2,000kg car traveling at 15m/s.
If the coefficient of kinetic friction is 0.9,
a)
How far do the two cars skid before coming to a stop?
8.19m
b)
What angle do they travel at?
56.3º
c)
Is kinetic energy conserved during this collision?
2)
A 400kg bumper car starts from rest and accelerates at 2.5m/s
2
to the right over a distance of 20m
when it collides perfectly elastically with a 600kg bumper car traveling at 5 m/s to the left.
After the
collision, the 600kg bumper car is traveling at 2 m/s at an angle of 15º above the horizontal.
What are
the velocity and the angle of the 400 kg bumper car?
0.88m/s @
242.85º
3)
In a pool game, the cue ball, which has an initial speed of 5m/s,
makes an elastic collision with the eight ball, which is initially at rest.
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 Fall '11
 Hill
 Friction, Kinetic Energy, Mass, Momentum, Velocity, ball, Bumper car

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