A ball bounces off a wall so that its velocity coming back has the same magnitude that it had prior to bouncing. (a) Is there a change in the momentum of the ball? Explain. Yes, a change in direction implies a change in momentum. Yes, some energy is lost when the ball collides with the wall so the momentum will change. No, there is no change in momentum since the collision is completely elastic. (b) Is there an impulse acting on the ball during its collision with the wall? Explain. Yes, there is an impulse acting on the ball since energy is lost in the collision of the ball with the wall resulting in a decrease in momentum. Yes, the force exerted by the wall on the ball first slows the ball down and continues to act on the ball as it starts to speed up in the opposite direction until it clears the wall. No, there is no impulse acting on the ball during its collision with the wall because it is absorbed by the elasticity of the ball.
A ball bounces off a wall so that its velocity coming back has the same magnitude that it had prior to bouncing.
(a) Is there a change in the momentum of the ball? Explain.
Yes, a change in direction implies a change in momentum.
Yes, some energy is lost when the ball collides with the wall so the momentum will change.
No, there is no change in momentum since the collision is completely elastic.
(b) Is there an impulse acting on the ball during its collision with the wall? Explain.
Yes, there is an impulse acting on the ball since energy is lost in the collision of the ball with the wall resulting in a decrease in momentum.
Yes, the force exerted by the wall on the ball first slows the ball down and continues to act on the ball as it starts to speed up in the opposite direction until it clears the wall.
No, there is no impulse acting on the ball during its collision with the wall because it is absorbed by the elasticity of the ball.
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