Two identical balls, each of mass m, are tied with a string and kept on a frictionless surface. Initially, the string is slack. They are given velocities 2u and u. in the same direction. Collision between the balls is perfectly elastic. After the first collision, what is the total loss in kinetic energy of the balls?

Two identical balls, each of mass m, are tied with a string and kept o

1.	Two identical balls, each of mass m, are tied with a string and kept on a frictionless surface. Initially, the string is slack. They are given velocities 2u and u. in the same direction. Collision between the balls is perfectly elastic. After the first collision, what is the total loss in kinetic energy of the balls?
Answer» `2"MU"^(2)` `"mu"^(2)` `3"mu"^(2)` zero Solution :SINCE the collision is ELASTIC there is no loss in `KE`