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6 May, 11:22

A 58.0 kg snow skier is on the top of 351 m high hill. After she has gone down a vertical distance of 142 m, what is her mechanical energy? Explain your answer (CER) !

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  1. 6 May, 11:29
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    Initially skier is at a height of 351 m. Her kinetic enery will be nil because she is at rest. Her potential energy will be calculated as follows

    potential energy = mgh where m is mass, h is height and g is acceleration due to gravity

    potential energy = 58 x 9.8 x 351

    = 199508.4 J

    Total mehanical energy = potential energy + kinetic energy

    = 199508.4 J

    According to conservation of mechanical energy, at the height of 142 m also total mechanical energy will be same. At this height some potential energy will be converted into kinetic energy but total of potential and kinetic energy will be same.
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Home » Physics » A 58.0 kg snow skier is on the top of 351 m high hill. After she has gone down a vertical distance of 142 m, what is her mechanical energy? Explain your answer (CER) !
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