Physics, 17.06.2020 16:57, jhgfd1170

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?

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

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