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22 January, 07:14

A 150 kg mass is on a cliff 50 m high. What is its potential energy? 9 How much work is done moving a 2.5 kg book to a shelf 3.0 m high? 10. A 150 pound man runs up a stairway 25 feet above ground level in 10 s. How much work did the man do?

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  1. 22 January, 09:55
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    PE=mgh=150kg*9.8m/c² * 50m=73500 J

    W=F*d=mgd = 2.5*9.8*3.0 = 73.7J

    W=mgh=68.0*7.62*9.8 = 50.78 J

    150 lb = 68.0 kg

    25 ft = 7.62m
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Home » Physics » A 150 kg mass is on a cliff 50 m high. What is its potential energy? 9 How much work is done moving a 2.5 kg book to a shelf 3.0 m high? 10. A 150 pound man runs up a stairway 25 feet above ground level in 10 s. How much work did the man do?
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