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Efficieny of an Engine

  1. Dec 21, 2008 #1
    Hello, I would like help with analyzing the car engine for a deeper understanding.

    This is what I cant understand in my head.

    A piston is connect to a rotating circular with a radius of 0.10m and mass of 1kg. If you pushed the piston down 0.20 m with a force of say 100 N (thus work = 20 J). This would cause the rotating circle to make a half turn. This seems inefficient, is it? Could someone explain if there is an energy loss here, and if so where did the energy go?

  2. jcsd
  3. Dec 21, 2008 #2


    User Avatar

    Staff: Mentor

    Welcome to PF.

    There is no energy loss in the conversion of linear motion to rotational, except in the friction in the parts.
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