How is perpetual motion related to anti-gravity?

Question

On another question some claimed that an anti-gravity machine would require perpetual motion. I would like to know why and/or how.

Answer 1

it wouLdn't
but a perpetual motion machine might require anti-gravity, or atleast very LittLe gravity

Answer 2

Perpetual motion and anti-gravity have little or nothing to do with each other. Perpetual motion is like alchemy it is some thing physisist try to do but know it isn't going to work. All perpetual motion device to date define either the definition of perpetual motion, or the laws of thermodynamics. Anti gravity fixes neither of these problems. To learn more about this just look on Wikipedia

Answer 3

It's NOT! There really is NO Such Thing as Perpetual Motion or a Perpetual Motion Machine!. Anti-Gravity on the other hand is real. What to demonstrate it yourself with magnets.

Answer 4

G'day Shin,

Thanks for the question.

I assume that the person was equating anti-gravity machines with perpetual motion.

Anti-gravity is a hypothetical means of countering or otherwise modifying the effects of gravity, typically in the context of spacecraft propulsion. Such systems are limited to the realm of science fiction given the current understanding of the way gravity works, but this has not stopped legions of hopefuls from making various spinning disks and magnets in hopes of perfecting such a device.

Having said that, there are a number of technological advances that previous generations would have described as improbable or impossible.

I have attached some sources for future reference.

Regards

Answer 5

Perpetual motion deals with Newton's law
And an anti gravity machine deals with fiction

Answer 6

Perpetual motion is a myth. Perpetual motion is motion without the addition of energy It assumes a mechanism operating in a vacuum with zero friction and not subject to any other external forces such as electromagnetic.There is no magical anti- gravity! However, gravitational forces can be overcome by many means ,such as: muscular force,electromagnetic force, aerodynamic lift,etc.These all require the use (conversion) of energy.

Answer 7

It's the other way around. Perpetual motion would require anti-gravity. Plus a few other antis. Friction is one inhibitor of perpetual motion, and gravity is responsible for friction.

Answer 8

the two are not related. perpetual motion is an extreme idea (like absolute zero) that cannot be achieved, only striven towards. if you believe in final entropy, perpetual motion becomes impossible as ALL systems will stop at that point. antigravity is a concept of propulsion that could be acheived with the right technology and likely great power. i would suggest that in order to develop antigravity, we find a way to focus on gravitational fields in the OPPOSITE direction, and draw ourselves toward them. consider the possibilities in a universe where stars and galaxies abound IN EVERY DIRECTION. with such gravity focussing technology, one could travel in any direction except outside the universe.

Answer 9

you wold need an object in motion at the right speed to overcome the effects of gravity, if it were to slow it would fall, if it were to fast it would travel out of control of a bodies gravitational field therfore breaking away and possibly become drawn toward a larger body. Perpetual motion at a constanjt speed just enough to overtake a bodies gravitational field is the only way to acheive anti-gravity

Answer 10

perpetual motion to defy gravity is displayed in the orbiting of the earth (the space station) the space station has to go a certain speed so that the pull of earths gravity would make the space station fall at all times but the speed of the space station would keep the gravity from pulling it straight down and cause it to fall in a continuous circle? because if the space station wasn't moving it would plummet to the earth as soon as it was positioned (im not positive!!!)

Answer 11

I didn't see that answer, but they may have just meant that they're similarly implausible. Perpetual motion, in the free energy sense, is impossible, and most anti-gravity claims are not far behind on the crackpot index.