1.

A man weighing 50 kg f supports a body of 25 kg fon his head. What is the work done when he movesa distance of 20 m up an incline of 1 in 10 ? TakeFig.

Answer»

Incline of one in 10 means that in moving 20 m he reached a height of H= 2 m.

Total weight of man and block = 75kg

Thus work done is: mgH

75*9.8*2 = 1470J



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