question_answer

A small sphere of mass 1 kg is moving with a velocity\[(6\hat{i}+\hat{j})m{{s}^{-1}}.\]. It hits a fixed smooth wall and rebound with velocity\[(4\hat{i}+\hat{j})m{{s}^{-1}}\]. What is the coefficient of restitution between the sphere and the wall?

Answer:

0.66