makes an elastic collision with the eight ball, which is initially at rest.
The cue ball hits the eight ball at a 20
o
angle and the eight ball leaves at
a 30
o
with a velocity of 2m/s.
Find the speed and direction of the cue
ball immediately after the collision.
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?
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1)
Two hockey pucks collide on a horizontal, frictionless surface. The
velocities of both pucks before the collision are shown in the drawing.
After they collide, puck A is moving as shown. Assume that the mass of
puck A is twice as large as the mass of puck B: M
A
= 2M
B
.
a)
Find the magnitude and direction of the velocity of puck B after the
collision.
40.48m/s, 331.26
o
b)
Is kinetic energy conserved in this collision? Use 1kg for “M”.
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 Fall '11
 Hill
 Friction, Kinetic Energy, Mass, Momentum, Velocity, ball, Bumper car

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