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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A man of mass 50 kg is standing at one end of a boat of length 25 m and mass 200 kg. If he starts running and when he reaches the other end, he has a velocity of 2 ms⁻¹ with respect to the boat, the final velocity of the boat is (in ms⁻¹)

Answer: (A)

Solution

Let be the boat's velocity (ground frame); the man's ground velocity is + 2 (opposite net direction accounted for by sign).

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Question ID VK-152880