Two identical billiard balls striks a rigid wall with the same speed but at different angles , and get reflected without any change in speed , as shown in Fig . What is (i) the direction of the force on the wall due to each ball ? (ii) the ratio of the magnitudes of impulses imparted to the balls by the wall ?

Answer

(i) Direction of force is same in both cases i.e. normal to the wall along the positive x-direction. (ii) `2:sqrt3`