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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A ball of mass m moves with speed v and strikes a wall normally and is reflected back normally. If the time of contact with the wall is t, the average force exerted by the ball on the wall is

Answer: (A)

Solution

F = Δp/t = [mv − (−mv)]/t = 2mv/t.

Question ID VK-152863