Physics for IGCSE & O level - Forces And Energy (Section 4 - No. 28)
What is the formula used to calculate efficiency?
Efficiency = (useful energy output) / (total energy input) * 100%
Efficiency = (total energy output) / (useful energy input) * 100%
Efficiency = work done / distance
Efficiency = force * distance
Explanation
The efficiency formula is (useful energy output / total energy input) * 100%
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