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?A. `"mu"//2`B. `"mu"//4`C. `(2"mu")//3`D. none of these

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

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?A. `"mu"//2`B. `"mu"//4`C. `(2"mu")//3`D. none of these
Answer» Correct Answer - A For left ball: `I=mv-"mu"=m(3u)/2-"mu"="mu"//2`

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