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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A ball of mass m moving with velocity V, makes a head-on elastic collision with a ball of the same mass moving with velocity 2V towards it. Taking the direction of V as positive, the velocities of the two balls after collision are, respectively [MP PMT 2002]

Answer: (D)

Solution

For an elastic collision between equal masses, the two bodies simply exchange velocities. The first ball has initial velocity +V and the

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Question ID VK-154022