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I've been thinking... - HSN forum

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I've been thinking...


4 replies to this topic

#1 dfx

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Posted 26 September 2005 - 07:18 PM

Here's one that's bugging me...

According to Newton's Law of Universal Gravitation, if you launch a massive object and a relatively insignificant object into space - or any environment without friction/air resistance - then theoretically they should attract each other, with a resultant force (G.m1.m2/r^2). Isn't that a violation of the laws of conservation of energy, as you have no input force, but you still have a resultant. Imagine the implications in space... a super efficient system?

#2 Dave

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Posted 26 September 2005 - 08:19 PM

there is no violation of conservation of energy in the same way a magnet doesnt break the laws on conservation

space is a efficient system because there is no restoring force like gravity, air resistance or similar

If i am not here i am somewhere else



#3 dfx

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Posted 26 September 2005 - 09:19 PM

Well it is indirectly at a stretch, because you're not having any input, but you're still getting output. I see what you mean with the magnet... hmmmmm. Why not outsource to outerspace instead of india. rolleyes.gif

#4 Ian

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Posted 30 October 2005 - 01:18 PM

This might not be related but the two objects that are next to each other have a negative potential energy. In "A Brief History of Time" Steven Hawkings suggested that the overall amount of energy in the universe is 0 as it would take energy to pull matter away from its self.

#5 dfx

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Posted 30 October 2005 - 05:58 PM

Yeah.. the whole massless charge paradox or something like that I think... fascinating lol.





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