I think the initial velocity of m is going to be v0 when M is the fixed reference frame. The final velocity will be unchanged when m is bounced straight back without changing the velocity so I would think that the final velocity is constant.
Homework Statement
Consider a head-on, elastic collision between two bodies whose masses are m and M, with m << M. It is well known that if m has speed v0 and M is initially at rest, m will bounce straight back with its speed unchanged, while M will remain at rest (to an excellent...
This is the question:
A physics lecture demonstration uses a small canon mounted on a cart that moves at constant velocity v across the floor. At what angle theta should the cannon point (measured from the horizontal floor of the cart) if the cannonball is to land back in the mouth of the...