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Forums
Physics
Special and General Relativity
Where does the energy of gravity come from?
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[QUOTE="Ibix, post: 6851253, member: 365269"] If I lift a thing up and drop it, then harvest the kinetic energy to do something, then the energy came from my muscles and was briefly stored as gravitational potential energy before being released and used. Hydro power stations use the Sun to lift water to the clouds which then falls as rain into the reservoirs, so they are an indirect form of solar power. So it is always with any energy generation scheme that "uses" gravitational potential energy from something moving down. Look to whatever lifted the thing up in the first place. Since this is in relativity (at time of writing) it's worth noting that conservation of energy doesn't necessarily apply in all spacetimes. It works in Eartylhbound situations, though. [/QUOTE]
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Forums
Physics
Special and General Relativity
Where does the energy of gravity come from?
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