A man is raising himself and the crate on which he stands with an acceleration of 5 m/s2 by a massless rope-and pulley arrangement. Mass of the man is 100 kg and that of the crate is 50 kg. If g = 10 m/s2, the contact force between man and the crate is

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2250 N

1125 N

750 N

375 N

answer is D.

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Detailed Solution

m1 = 100 kg, m2 = 50 kg, a = 5 m/s2 T + N -m1g = m1aT-N - m2g = m2aSolving these:T = 1125 N andN = 375 N

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