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11/2/2015 1:26:19 AM
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Do you think that perpetual motion machines are possible?
Just a quick poll to see where everybody stands on the topic of a Perpetual Motion Machine. Feel free to post your opinion, but be prepared to defend it with your knowledge of thermodynamics against those with differing opinions.
[spoiler]Round 1, fight. [/spoiler]
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It's been proven to be impossible
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1 ReplyThe entire system has to have no friction, yes still create power. So no it's impossible
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1 ReplyI thought it was impossible to get more energy than what you put into something. Was a short-term engineering student.
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2 RepliesYou're welcome.
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you know, all answers are wrong, and if you don't agree with the results you are incompetent of understanding how right the results are. [spoiler]the results are true ones[/spoiler]
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1 ReplyBecause who needs laws of physics amiright?
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Things in space that don't hit anything stay in perpetual motion. Does that count?
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2 RepliesPerpetual? No. Nearly a century? Perhaps
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2 RepliesWe should attach a generator to Walt Disney because he must be infinitely rolling over in his grave.
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Give me Kate Upton & you'll have your perpetual motion machine.
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Put an efficient lamp connected to the solar panel, then rig your phone charger to it. APPLE LOOOMINATTI
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Edited by SpeirlingFearg: 11/3/2015 12:24:54 AMPeople sometimes get the wrong idea when they hear "perpetual motion." They think "free energy." Perpetual motion has no output; that is, in fact, the whole point. Consider this simple example. You take a wheel on an axle, and set it spinning with a fixed angular velocity, then leave it alone. It will come to a stop, due to the friction of the wheel and axle in contact. If you oil the axle, you reduce friction, but not entirely. So you make use of ball bearings. The wheel eventually stops. This is where some smartass suggests a magnetic bearing. Neodymium magnets, with North poles facing out from the axle, in from the wheel. No physical contact means no friction, right? Problem solved. Right. But now, you've got a rotating magnetic field. Which, if I recall correctly, by Faraday's Law, will induce an electric current in a nearby loop of conductive material. This requires energy, which is taken from the wheel. The wheel stops. I just had an idea: a chemical reaction can exist in a state of dynamic equilibrium; take the production of ammonia, for example. As far as I know, the reaction never stops. It might cool to the ambient temperature of the room, but that's it. Does this count as a PMM, or must it be a macroscopic mechanical object?
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4 Repliesfor teh lulz
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Maybe using magnets with absolutely zero friction in a "perfect" vacuum with no gravity. Extracting energy from it would do nothing but slow it down though and it would stop at some point.
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13 RepliesNope. Some energy must be lost or input for a machine to keep functioning.
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You'll always loose energy.
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3 RepliesJesus I cannot believe 79% of people are this stupid
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1 ReplyIf we can find a way around the laws of physics, sure.
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5 RepliesIn a frictionless vacuum without gravity, yes. With gravity? Also yes. With any sort of friction? No
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All you need is a portal gun. Shoot the roof, shoot the floor, set up a waterwheel and hook it up to a generator and pour in a bunch of water.
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11 RepliesSmaller wheel in the front = constant downhill.
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Something about friction and gravity, blah blah blah...
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Anything is possible
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Maybe in space but it couldn't be used as an energy source.
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4 RepliesNo. Perpetual motion itself is possible, but only in an environment such as space, with no friction/air resistance/etc affecting the object. However, attempting to extract energy from it would at the very least slow it down.
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Don't worry, all you have to do is hack the laws of physics.
