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24 February, 02:29

Bob weighs 80 pounds. He ran up the steps which rose 14 feet. Fred weighs 110 pounds. He ran up the same steps as Bob. If both boys reached the top of the 14-foot stairs at the same time, which boy had the greatest horsepower?

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  1. 24 February, 06:06
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    Bob gained (80lbs x 14ft) = 1120 ft-lbs of energy.

    Fred gained (110lbs x 14ft) = 1540 ft-lbs of energy

    Since they both took the same amount of time, Fred's power (rate

    of doing work) was greater than Bob's power (rate of doing work).
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