A construction worker puts 20J of energy in to one strike of his hammer on the head of a nail. The energy transferred to driving
d nail in to d wood is 8J. What is d efficiency of d construction worker's hammering?
2 answers:
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.
Answer:
efficiancy=40 percent
Explanation:
efficiency=energy output/energy input×100
efficiancy=8J/20J×100
efficiancy=0.4×100
efficiancy=40 percent
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