An electric motor with a 1200 hp output drives a machine with an efficiency of 60%. What is the energy output of the machine per second?

Question

An electric motor with a 1200 hp output drives a machine with an efficiency of 60%. What is the energy output of the machine per second?

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Kiệt Gia 4 years 2021-08-02T08:45:40+00:00 1 Answers 11 views 0

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  1. quangkhai
    0
    2021-08-02T08:47:29+00:00
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    Answer:

    536,904 J/s

    Explanation:

    The energy output from motor is the input energy in the machine.

    We know that efficiency is percentage energy ouput to energy input, and expressed as

    n=\frac {E_o}{E_i}

    Where n and E represent efficiency and energy respectively, subscripts o and i represent output and input respectively. Since for the machine we have the input energy then the output will be the product of efficiency and input energy

    Energy output=0.6*1200 hp=720 hp

    Converting hp to J/s we multiply by 745.7

    Energy is 720*745.7=536,904 J/s

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