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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A sphere of mass m moving with a constant velocity u hits another stationary sphere of the same mass. If e is the coefficient of restitution, then the ratio of the velocities of the two spheres after collision will be

Answer: (A)

Solution

For equal masses with one initially at rest, the post-collision velocities are v₁ = u(1−e)/2 and v₂ = u(1+e)/2. So v₁/v₂ = (1−e)/(1+e).

Question ID VK-154070