Answer:
The efficiency can be found using the formula ;
efficiency=energy output divided by energy input ×100%.
efficiency=8.0j÷ 20j × 100%
efficiency=0.4 ×100%
efficiency=40%.
the efficiency of the hammer strike was 40%. vibration and heating of the nail are two possible reasons for the energy loss.
efficiancy=40 percent
Explanation:
efficiency=energy output/energy input×100
efficiancy=8J/20J×100
efficiancy=0.4×100
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