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18 October, 19:14

Carlota does 2000 J of work on a machine. The machine does 500 J of work. What is the efficiency of the machine?

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  1. 18 October, 19:40
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    25%

    Explanation:

    Efficiency of a machine: This can be defined as the ratio of work output to work input of a machine, expressed in percentage. mathematically, it can be represented as

    E (%) = (work output/work input) * 100/1 ... Equation 1

    Given: Work output = 500 J, Work input = 2000 J

    Substituting into equation 1

    E (%) = (500/2000) * 100

    E (%) = 25%

    Hence the efficiency of the machine is 25%
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