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22 October, 15:34

A runner exerts a force of 234 N against the ground while using 1100 W of power. How long does it take them to run a distance of 30.0 m

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  1. 22 October, 15:48
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    6.38 seconds

    Explanation:

    We are given;

    The force exerted by the runner as 234 N Power used = 1100 W Distance as 30.0 m

    We are required to determine the time taken to run the distance;

    We know that power is the rate of work done

    That is;

    Power = work done : time

    But, work done = Force * distance

    Therefore;

    Work done = 234 N * 30 m

    = 7020 Joules

    Therefore, from the formula, Power = work done : time

    Time = Work done : power

    Thus;

    Time = 7020 J : 1100 W

    = 6.38 seconds

    Hence, the time taken is 6.38 seconds
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