A point mass m collides with a disc of mass m and radius R resting on a rough horizontal surface as shown . Its collision is perfectly elastic. Find angular velocity of the disc after pure rolling starts

A point mass m collides with a disc of mass m and radius R resting on

1.	A point mass m collides with a disc of mass m and radius R resting on a rough horizontal surface as shown . Its collision is perfectly elastic. Find angular velocity of the disc after pure rolling starts
Answer» `((2U)/(3R))` `((3u)/(3R))` `((5U)/(3R))` `((2u)/(5R))` ANSWER :A