Harnessing energy of a rotating mass

In summary, the conversation discusses the possibility of harnessing the kinetic energy of a rotating mass to generate electricity, specifically for powering a light on a bicycle wheel. While there may be ways to generate energy mechanically in this scenario, such as using magnets and coils, the most common method is through the use of bicycle dynamos or generators. These devices have been in existence for some time and work by converting the motion of the wheel into electrical energy.
  • #1
freerangequark
17
0
Is it possible to harness some of the kinetic energy of a rotating mass to convert it to electricity? More to the point... If I wanted to put a light on a bicycle wheel, is there any way to power the light using the uniform accelerated circular motion of the wheel? Or are the gains of centrifugal "force" countered by the centripetal?

It seems that generating energy mechanically like this would require relative motion of some sort... unless I could use the motion to turn a small propeller to turn a generator, etc...

Thanks!
FRQ
 
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  • #2
I don't think there's anyway to harness that power in the way you're thinking. You could put magnets on the wheel that would generate a current in a coil stationary to the wheel - you could do this near the axle or the top of the wheel.
Can't think of anything other way.
 
  • #3
They have existed for quite some time, they're called bicycle dynamos or bicycle generators.

http://www.aztlanbicycle.com/images/products/lowrider-lights-mirror/LIGHT_GENERATOR_LIGHT_VISOR_34339.jpg

http://www.freepatentsonline.com/6703716-0-large.jpg

pm5b_amsterdam_bicycle_genr.jpg
 
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FAQ: Harnessing energy of a rotating mass

What is the concept of harnessing energy of a rotating mass?

The concept of harnessing energy of a rotating mass is based on the principle of conservation of energy, where the rotational energy of a mass can be used to do work.

How is the energy of a rotating mass harnessed?

The energy of a rotating mass can be harnessed using various methods such as flywheels, rotating turbines, or gyroscopes.

What are the practical applications of harnessing energy of a rotating mass?

The practical applications of harnessing energy of a rotating mass include energy storage, power generation, and stabilization of systems.

What factors affect the amount of energy that can be harnessed from a rotating mass?

The amount of energy that can be harnessed from a rotating mass depends on factors such as the mass of the object, its angular velocity, and the efficiency of the energy conversion mechanism.

Are there any limitations to harnessing energy of a rotating mass?

Yes, there are limitations to harnessing energy of a rotating mass, such as the energy losses due to friction and the need for a continuous energy input to maintain the rotation.

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