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The Simple Pulley

A machine lif...

Question

A machine lifts a load of 200 kg in a vertically upward direction. If the machine is driven by a freely falling mass of 40 kg through a distance of 8 m in 4 s, calculate power intput of machine.[Take g =10ms^–2]

A

800 W

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B

500 W

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C

600 W

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D

450 W

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Solution

The correct option is A
800 W

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