A force of 11 N is applied to the handle of a screwdriver being used to pry off the lid of a paint can. As the input force moves through a distance 0.3 m, the screwdriver does 3 J of work on the lid. What is the efficiency of the screwdriver? Show your work

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Physics

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26 February, 03:26

A force of 11 N is applied to the handle of a screwdriver being used to pry off the lid of a paint can. As the input force moves through a distance 0.3 m, the screwdriver does 3 J of work on the lid. What is the efficiency of the screwdriver? Show your work

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Carleen · Answer 1

Joules = mass over a distance

11N*0.3m=3.3 Joules

efficiency = energy out/energy in * 100%

energy out = energy of the tool=3 J

Energy in = added energy (man) = 3.3 J

3/3.3*100%=90.91%