Thank you so much! Do you have any idea how to do the second question? I'm guessing that the initial and final velocity will be the same because the ball bounces elastically, but I don't really know.
Homework Statement
A ball is thrown against a fixed wall where it bounces elastically. The mass of the ball is M and the velocity just before it hits the wall is U. Ignore the force of gravity in this question.
a) Does the Principle of Conservation of Momentum apply to this situation?
b) Obtain...