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  4. If a machine performs 4000 J of output work and 1000 J is energy loss due to friction then, find efficiency of machine

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Q. If a machine performs $4000\, J$ of output work and $1000 \,J$ is energy loss due to friction then, find efficiency of machine

JIPMERJIPMER 2018Work, Energy and Power

Solution:


Efficiency = $\frac{output \,work}{heat \,taken}$
$=\frac{4000}{4000+1000}=\frac{4}{5}\quad100 = 80\%$