Question

A particle travels between two parallel ver- tical walls separated by 12 m. It moves to- ward the opposing wall at a constant rate of 5.4 m/s. It hits the opposite wall at the sam
a) What will be its speed when it hits the opposing wall?
b) At what angle with the wall will the particle
opposing wall?

Answer 1

something is missing here. Constant speed? Then its final speed is the same.