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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A train is moving with velocity 20 m/sec. On this, dust is falling at the rate of 50 kg/minute. The extra force required to move this train with constant velocity will be

Answer: (A)

Solution

Rate of mass addition = 50/60 ≈ 0.833 kg/s. The extra force needed (to accelerate

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Question ID VK-153269