The efficiency of the machine is 83.3% when the output is 25 joules.
This can be defined as the ratio of the work output to the work input of a machine, expressed in percentage.
To calculate the efficiency of the machine we use the formula below.
Formula:
• E (%) = (Wo/Wi)100........... {Eq1}
Where:
• E (%) = Efficiency of the machine
• Wo = Work output
• Wi = Work input.
From the question,
Given:
Wo = 25 Joules
Wi = 30 Joules
Substitute these values into equation 1
We have,
• E (%) = (25/30)100
• E (%) = 83.3%
Hence, the efficiency of the machine is 83.3%.
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