A machine has an efficiency of 61 percent. Find the input work if the output work is 140 J.
Question
A machine has an efficiency of 61 percent. Find the input work if the output work is 140 J.
Solution
To find the input work, we can use the formula for efficiency:
Efficiency = (Output work / Input work) * 100
Given that the efficiency is 61 percent and the output work is 140 J, we can rearrange the formula to solve for the input work:
Input work = (Output work / Efficiency) * 100
Substituting the given values:
Input work = (140 J / 61%) * 100
To calculate this, we need to convert the efficiency from a percentage to a decimal:
Input work = (140 J / 0.61) * 100
Input work = 229.51 J
Therefore, the input work is approximately 229.51 J.
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