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3 October, 21:22

A women lifts a 300 newton child a distance of 1.5 meters in 0.75 seconds. What is her power output in lifting the child?

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  1. 3 October, 21:30
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    Power = (work) / (time)

    but Work = (force) x (distance)

    so Power = (force) x (distance) / (time)

    = (300 N) x (1.5 m) / (0.75 sec)

    = (450 J) / (0.75 sec)

    = 600 J/sec = 600 watts.

    600 watts = 0.8 horsepower!

    Poor lady!

    The reason for that is that her kid weighs almost 70 pounds!
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