A110-pound person pulls herself up 4.0 feet. this took her 2.5 seconds. how much power was developed? 0.13 hp 0.32 hp 2.0 hp 3.1 hp

0.32 Hp is the answer. right

Power developed by her is 0.32 hp

Explanation:

Work done , W= Force(F) X Displacement (d) in the direction of force

Thus work done ,

Now 1.0 ft-lbf = 1.355 joules of energy

Therefore , work done, W= 440x 1.355 J = 596.2 J

Average Power ,

=>

We know 746 hp = 1.0 watts

=>

Thus average power developed by her is 0.32 hp

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