A 50 kg person stands on a 25 kg platform. He pulls on the rope which is attached to the platform via the frictionless pulleys as shown in the figure. The platform moves upwards at a steady rate if the force with which the person pulls the rope is :-

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T + N = mg ……… ( 1 ) & 2 T = N + mg .. …… ( 2 ) From (1) \& (2) T = 250 N

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