Physics, 13.05.2021 03:40 Melissamv2052

A construction worker puts 20 J of energy in to one strike of his hammer on the head of a nail. The energy transferred to driving the nail into the wood is 8.0 J. What is the efficiency of the construction worker's hammering? (2 sig figs and answer in a percentage)

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A construction worker puts 20 J of energy in to one strike of his hammer on the head of a nail. The...

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