Question

1. A rubber ball with a mass of 1.35 kg is stuck in a tree. To knock it out, you throw a golf ball with a mass of 0.0450 kg at it. The golf ball hits the rubber ball with a speed of 20.0 m/s and bounces off with a speed of 10.0 m/s. The golf ball is moving in the same direction horizontally after the collision as it was before it hit the rubber ball. When the golf ball hits the rubber ball, it’s velocity makes an angle of 35.0 ◦ with the vertical. After it bounces off, the golf ball is traveling 40.0 ◦ below the horizontal.

(a) In what direction does the rubber ball travel after the collision? (b) What fraction of the initial kinetic energy was lost during the collision? (c) If the two balls are in contact for 0.120 s, what is the average acceleration of the golf ball during the collision?

Answer #1

Two rubber balls undergo an elastic collision. Ball 1 has a mass
of 10 kg and an initial velocity of 5 m/s in the positive x
direction. Ball 2 has a mass of 10 kg and is
stationary. What is the final velocity of the two
balls, v1f, and v2f?

A soft ball (m = 0.14 kg) moving horizontally to the right hits
a wall with a speed of 16.2 m/s. After the collision the ball
bounces back and moves horizontally to the left at a speed of 14.4
m/s. If the collision lasts for 0.0015 s, what is the magnitude of
the (average) force exerted on the ball by the wall?

Two balls collide elastically. Ball A has a mass of 3.00 kg and
moves to the right at 2.00 m/s. Ball B has a mass of 1.29 kg, and
moves to the left, also at 2.00 m/s.The balls collide head-on. A)
Find the speed of Ball A after the collision. B) Find the speed of
Ball B after the collision. C) Find the impulse delivered to Ball A
during the collision. D) Find the impulse delivered to Ball B
during...

A 6.00 kg ball, A, moving at velocity 3.00 m/s due east collides
with a 6.00 kg ball, B, at rest. After the collision, A moves off
at 40.0° N of E and ball B moves off at 50.0° S of E. What is the
speed of the balls after the collision?

A ball with mass M = 5 kg is moving with speed V=10 m/s and
collides with another ball with mass m = 2.5 kg which is initially
stationary. There is no other force such as gravity acting on the
two balls. After the collision, both balls move at angle θ=30
degrees relative to initial direction of motion of the ball with
mass M = 5 kg. a) What are the speeds of the two balls after the
collision? b)...

A 1.00-kg ball, moving to the right at a velocity of +1.35 m/s
on a frictionless table, collides head-on with a stationary 8.00-kg
ball. Find the final velocities of (a) the 1.00-kg ball and of (b)
the 8.00-kg ball if the collision is elastic. (c) Find the
magnitude and direction of the final velocity of the two balls if
the collision is completely inelastic.

A ball of mass 0.250 kg that is moving with a speed of 5.5 m/s
collides head-on and elastically with another ball initially at
rest. Immediately after the collision, the incoming ball bounces
backward with a speed of 3.1 m/s . Calculate the velocity of the
target ball after the collision. Calculate the mass of the target
ball.

A ping pong ball (mass 0.0029 kg) strikes a bowling ball (mass
14 kg) head on with a speed of 89 m/s and bounces off elastically.
What is the speed of the ping pong ball after impact? Ignore
rotational motion.

Ball A has a mass of 100 kg; it is traveling to the right at 6.2
m/s. Ball B has a mass of 120 kg; it is traveling to the left at
4.7 m/s.(a) Assume an inelastic collision (they stick together).
Determine velocity at which the two move off together. Give speed
and direction. Pay attention to the + and – signs.(b) Assume they
have a perfectly elastic collision. Determine the speeds and
directions of each of the balls.

A ball of mass 0.310 kg that is moving with a speed of 5.7 m/s
collides head-on and elastically with another ball initially at
rest. Immediately after the collision, the incoming ball bounces
backward with a speed of 3.1 m/s .
1. Calculate the velocity of the target ball after the
collision.
2. Calculate the mass of the target ball.

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