Violation of energy conservation law?

  • Thread starter Gadersd
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The second object must then have more energy than the first. How can two equal forces have different energy outputs?
mfb gave the answer, in the equation E=Fd (energy E, force F and distance d).

You're expending more energy on one disk than on the other, even if you're applying equal force. That disk then will have more kinetic energy. (And that arm will be more tired.)
 

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