WhyNot?

How to convert force to motion

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Responses: 4 (2 in support, 0 neutral, 2 in opposition)
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I have a question about producing electricity with a constant push or pull motion. Not both. So if a car, for example, were pulling on something, how could that be used to generate electricity? I don't mean pulling something for a long distance, that would be easy. I mean just utilizing the force of the pull but not so much force that the car would move. The force would be utilized, so that the car would not move. I only want to use the force created. Say you weld a pole 3 feet long to the front of the car and begin to push on the accelerator, something attached to the pipe would counter or absorb the energy and then it would be made into a different kind of motion so that the arm of a generator could be moved. What sort of device could be hooked up or made to convert that pulling or pushing force into a motion so that the motion could then be used to power a generator?

okmedia, Jul 12 2007

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Energy is transferred when there is a change. Pressure increased on a piezoelectric crystal generates electricity. But a static pressure without change does not generate energy. If it did, any heavy object would be a source of energy.

sand, Jul 13 2007

Suppose I had a 55 gallon drum and cut it in half to catch wind, but rather than allow it to turn a wind mill I only allow it to move a couple inches, during that space I want to utilize it.

okmedia, Jul 13 2007

Take the steam powered locomotive. Doesn't it create pressure, which is force?

okmedia, Jul 13 2007

But the steam force is only useful as the pressure is released through movement.

sand, Jul 13 2007

That is what I want to do, convert the force into movement, but without the barrel or the car moving.

okmedia, Jul 13 2007

Power = Force over Distance

Zero distance equates to zero power

jamesbdunn, Jul 14 2007

In classical physics what you want to do is not possible. However, in nuclear physics this is possible.

The critical geometry of a radioactive material can be influenced to provide a change in the mean free path of thermal free neutrons. Neuclear poisons mixed in with a compressible material can actively control the neutron density and actively control the temperature of the radioactive material. A thermionic generator could concievably produce electrical power or steam for a turbine.

A major issue here is that the rate at which the material compresses could cause prompt criticality and cause an uncontrolled power spike. Basically a nuclear melt-down.

This is not a dead end. The profile of the poisons needs to be shaped in such a ways as to limit the rate at which criticality is reached and maintained.

Power without significant displacement.

jamesbdunn, Jul 14 2007

Suppose you took a car and used it to press up against a large bag of air or water. This will create pressure just like inside a steam engine. Right? Suppose you took a chamber of air or water, then you used a motor to push a piston into the chamber. This would create pressure that can be converted into power, just like a steam engine right?

okmedia, Jul 15 2007

Why would you go through the trouble of pressing a car agaist a device to derive electricity when you already have an engine producing enough energy to run a pretty sizable generator?

If the idea is to use the weight of an object to somehow in the long run turn a turbine to produce electricity you have to remember that you have to reset the device at some point when the weight gets to the botttom of it's run or it's only a one time deal.

Hyenuf, Jul 17 2007

It wouldn't be "creating" power. You cannot do that. Physics prohibits that.

You would be converting the energy used to operate the motor to motion, which makes a stored energy in the form of fluid pressure. You can store air pressure, and release it later do so work through an air powered motor or linear actuator.

Liquid not so easy. You can however, pressurize a liquid with one sort of motive force to transmit over a pipe or hose, control with valves, and actuate loads with the pressure..

classicsat, Aug 29 2007

It would that if you have a flywheel with a roundpuller with a chain over the inside of the roundpuller on the flywheel with weight counter balanse each other, just enough to go upand down for so many sec. per. sq.ft. x motiom.

Jesse C Anderson, Apr 17 2008

There is no force until the car moves. Force is defined by mas time acceleration. If there is no accelleration there is no force

texast, Sep 26 2008

Texast, technically, you defined net force above. If two or more forces are acting in opposition, then you can have no motion even though the forces still exist. For example, when you stand on the Earth, gravity pulls you down, but the ground pushes you back up with enough force to equal the force of gravity. Thus, you don't move even though the force of gravity still exists and acts upon you.

Also the statement "There is no force until the car moves" creates a paradox. The car won't move until a force acts upon it. If there is no force until the car moves and the car won't move until there is a force, then the car could never move, ever.

Dwane Anderson, Sep 27 2008

you mean like gravity? ;)

myparadigm, Nov 01 2008