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. What is the impulse generated in the string during the second collision?

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. What is the impulse generated in the string during the second collision?
Answer» `"mu"//2` `"mu"//4` `(2"mu")//3` none of these Solution :For left BALL: `I=mv-"mu"=m(3u)/2-"mu"="mu"//2`