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?
Physics · High School · Mon Jan 18 2021
llm
Answered on
Formula :
Efficiency = P/V
We have,
Used energy, P = 8 J
Initial energy, V = 20 J
Efficiency = 8/20
= 0.4 J
Hence, efficiency of construction worker's hammering is 0.4 J