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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A wall is hit elastically and normally by ‘n’ balls per second. All the balls have the same mass ‘m’ and are moving with the same velocity ‘u’. The force exerted by the balls on the wall is [MHTCET 2023]

Answer: (D)

Solution

Each ball rebounds elastically so its momentum change is ; with n balls per second ;

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Question ID VK-062514