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11 December, 14:57

A force of 13 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 of 0.25 m, the screwdriver does 2

J of work on the lid. What is the efficiency of the screwdriver? Show your work.

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Answers (1)
  1. 11 December, 18:14
    0
    Answer;

    Efficiency = 61.54%

    Explanation;

    Efficiency is given by the Formula;

    Efficiency = work output/work input * 100%

    Work input = Input force * distance moved by the input force

    = 13 N * 0,25

    = 3.25 Joules

    Work output or work done by the screwdriver is 2 Joules

    Therefore;

    Efficiency = 2/3.25 * 100%

    = 61.54%
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