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16 October, 15:31

How much work does a weightlifter do when she moves a 100 kg weight 1.5 m?

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  1. 16 October, 16:18
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    Given that,

    Mass the weight lifter want to lift is 100kg

    M = 100kg

    And the lifter will raise it to height of 1.5m

    h = 1.5m

    We want to find the work done by the lifter.

    The workdone by the lifter is the gravitational potential work

    The workdone by lifting a body is calculated using

    Work done. = force * distance

    In this case, the force is the weight of the body and it is calculated using

    W = mg

    Where g = 9.81m/s²

    The distance is the height the body is raise

    Then,

    The work done becomes

    W = mgh

    W = 100 * 9.81 * 1.5

    W = 1471.5 J
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