Two identical spheres are placed at two diametrically opposite points of a smooth circular groove in a horizontal plane. One sphere starts with a speed .u. and collide the other after time .t.. If the coefficient of restitution of colliding bodies is .e.. What is the minimum time after which they again collide ?

Two identical spheres are placed at two diametrically opposite points

1.	Two identical spheres are placed at two diametrically opposite points of a smooth circular groove in a horizontal plane. One sphere starts with a speed .u. and collide the other after time .t.. If the coefficient of restitution of colliding bodies is .e.. What is the minimum time after which they again collide ?
Answer» ANSWER :`(2T)/(E)`