JEE Main 2022 Physics question

What percentage of kinetic energy of a moving particle is transferred to a stationary particle when it strikes the stationary particle of 5 times its mass? (Assume the collision to be head-on elastic collision)

(1)50.0%
(2)66.6%
(3)55.6%Correct
(4)33.3%

Answer: (3)

Solution

For a head-on elastic collision of a particle of mass m and velocity with a stationary particle of mass 5m, the velocity of the second particle is . The initial

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Question ID VK-034543