PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power
Problem
A smooth ball of mass 0.5 kg strikes a fixed, perfectly smooth vertical wall with a speed of 10 m s⁻¹ making an angle of 40° with the normal. The coefficient of restitution between the ball and the wall is 0.6. Which one of the following correctly describes the velocity components of the ball just after impact?
(a) Its normal component remains in the same direction but is reduced to 0.6 of its initial value; its tangential component remains unchanged in both magnitude and direction.
(b) Its normal component reverses direction and becomes 0.36 times its initial value; its tangential component remains unchanged in both magnitude and direction.
(c) Its normal component reverses direction and becomes 0.6 times its initial value; its tangential component remains unchanged in both magnitude and direction.
(d) Its normal component is unchanged; its tangential component reverses direction and becomes 0.6 times its initial value.