Answer:
Explanation:
Efficiency of a machine = (output / input ) × 100%
Efficiency =(142/263)×100= 54%
The efficiency of the machine which has the input as 263 J and the output as 142 J is 54%.
The efficiency of the machine is equal to the ratio of the output power to the input power. The efficiency of the machine can be given as,
[tex]\eta =\dfrac{P_{o}}{P_{i\\}}[/tex]
Here (P) is the power and subscript (o and i) represent the output and input.
The input of the machine is 263 J and the output of the machine is 142 J. Put the values in the above formula to find the efficiency of the machine.
[tex]\eta =\dfrac{142}{263}\\\eta=0.54\\\eta=54\%[/tex]
Hence, the efficiency of the machine which has the input as 263 J and the output as 142 J is 54%.
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