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Gravity as source of energy?

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Date Editor Before After
9/8/2013 6:57:33 PMGBrankTheEloIsALie before revert after revert
Before After
1 Ouch... 1 Ouch...
2 \n 2 \n
3 Licho said everything relevant about the physics part of the question, but 3 Licho said everything relevant about the physics part of the question, but
4 [quote]Do you think we could use gravity for infinite motion?[/quote] 4 [quote]Do you think we could use gravity for infinite motion?[/quote]
5 We already do. They're called sattelites. 5 We already do. They're called sattelites.
6 \n 6 \n
7 You cannot use gravity to generate energy, if that's your question. Gravity, or more precisely gravitational [b]force[/b] is the result of the gravitational field around massive (as in having [b]mass[/b]) objects. Moving in this field may require or perform [b]work[/b], which converts potential energy into other forms of [b]energy[/b] (momentum, heat etc.). 7 You cannot use gravity to generate energy, if that's your question. Gravity, or more precisely gravitational [b]force[/b] is the result of the gravitational field around massive (as in having [b]mass[/b]) objects. Moving in this field may require or perform [b]work[/b], which converts potential energy into other forms of [b]energy[/b] (momentum, heat etc.).
8 You cannot build a machine that uses a gravitational field to generate more energy than you provide the machine. A machine, by definition, performs a process ( which may or may not require energy) to perform a certain task, in this case generating ( more) energy. [i]After this process, it returns to its initial state[/i]. However, the work performed by ( or required for) moving through a gravitational field only depends on the start and endpoint. If both are the same, no overall work is done and hence no energy was gained in the process. 8 You cannot build a machine that uses a gravitational field to generate more energy than you provide the machine. A machine, by definition, performs a process ( which may or may not require energy) to perform a certain task, in this case generating ( more) energy. [i]After this process, it returns to its initial state[/i]. However, the work performed by ( or required for) moving through a gravitational field only depends on the start and end point. If both points are the same, no overall work is done and hence no energy was gained ( converted from gravitational energy) in the process.
9 \n 9 \n
10 Inb4 magnets. 10 Inb4 magnets.