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21 December, 11:24

A 66.0-kg short-track ice skater is racing at a speed of 10.0 m/s when he falls down and slides across the ice into a padded wall that brings him to rest. Assuming that he doesn't lose any speed during the fall or while sliding across the ice, how much work is done by the wall while stopping the ice skater?

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  1. 21 December, 13:16
    0
    3300J

    Explanation:

    Work done is the energy that is lost by the skater

    Formula for workdone = 1/2*mV^2

    m = 66kg

    V = 10m/s

    Work done = 1/2 * 66 * 10^2

    = 3300J
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