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I Mechanical energy to kinetic energy storage...?

  1. May 24, 2017 #1
    Can there be a system that utilizes mechanical energy to produce kinetic energy, but "storing" the mechanical energy to be used at a different time for kinetic energy? Like a bike where you pedal but don't move; that mechanical energy is waiting to be "released" by some mechanism

    *** exclude wind turbines, specifically I'm asking about a system that DOES NOT have to use any electrical energy if that's possible
  2. jcsd
  3. May 24, 2017 #2
    Kinetic energy IS mechanical energy.
  4. May 24, 2017 #3


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    I'm confused too, but are you just talking about a flywheel?
  5. May 24, 2017 #4


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    If you compress air with a cylinder and a piston, you're doing just that - the energy can be released at any time by letting go of the piston.
  6. May 24, 2017 #5
    Yes that's true I was thinking ahead
    That's all true i was thinking ahead. I really meant generating mechanical energy in one system, "transferring" or "storing" it to another system to be used later as mechanical energy.....which in turn generates kinetic enrgy
  7. May 24, 2017 #6


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    So, again, you appear to think "mechanical energy" is something specific when in reality it is a category that encompasses kinetic energy, potential energy, sound energy, spring energy, pressure energy, etc. So what you are asking is circular and trivially true. It's like asking if you can use a dollar as money.

    Please try to reword it to describe the actual mechanism of energy you are trying to generate and store. A bike wheel? A rock held over your head? A compressed spring? Eetc.
  8. May 24, 2017 #7


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    How about a Grandfather Clock?
  9. May 24, 2017 #8
    Possibly that you mean potential energy, to be later converted to kinetic energy. Any system with potential energy is doing this "storing": a spring, compressed gas, a water tank at some height above the ground, etc.
  10. May 24, 2017 #9
    A battery, for instance, with a generator connected to a mechanical device of some sort. The F1 cars collect energy from the brakes and from the turbo-charger and store it in the battery. This stored energy is then used as a boost for the Internal combustion engine or to keep the turbo spinning at low engine load. There are countless examples of this and efficient energy storage is a problem everyone would like to solve.
  11. May 25, 2017 #10


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    Or, you can push a minecart up a hill.
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