|Oct11-11, 09:21 PM||#1|
Momentum of ball bouncing off wall
1. The problem statement, all variables and given/known data
A racquet ball with mass m = 0.247 kg is moving toward the wall at v = 12.4 m/s and at an angle of θ = 32° with respect to the horizontal. The ball makes a perfectly elastic collision with the solid, frictionless wall and rebounds at the same angle with respect to the horizontal. The ball is in contact with the wall for t = 0.063 s.
2. Relevant equations
What is the magnitude of the change in momentum of the racquet ball?
3. The attempt at a solution
I found the initial P already and am not sure if I should use the (delta)P= F(net)* (delta)t and use 1-d kinematics to find acceleration or how exactly to begin.
|Oct12-11, 04:08 AM||#2|
Since the collision is assumed to be perfectly elastic, try using conservation of KE.
|Oct12-11, 04:08 AM||#3|
Then find the change in momentum.
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