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21 March, 21:48

A 63 kg object needs to be lifted 7 meters in a matter of 5 seconds. Approximately how much horsepower is required to achieve this task?

A. 1.16 hp

B. 864.36 hp

C. 441 hp

D. 0.59 hp

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Answers (1)
  1. 21 March, 21:53
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    1.16 horse power. Option A.

    Step-by-step explanation:

    Work done = m g h = 63 * 9.81 * 7 = 4326.21 joules

    Power = 4326.21 / 5 = 865.24 Watts

    1 Horse power = 746 watts so the answer is 865.24 / 746 = 1.16 HP to nearest hundredth.
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