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22 July, 09:49

A pulley system operates with 40% efficiency. if the work put in is 200 joules, how much useful work is produced?

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  1. 22 July, 11:42
    1. Efficiency is the measure of how efficient a process is. It is used to assess the ability of a process in avoiding waste energy, materials, money and time in doing a desirable output. It is calculated as;

    Efficiency = useful energy ouput / total energy input

    .40 = useful work / 200

    useful work = 80 joules
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