Physics Help Forum Is the increase in kinetic energy equal to the decrease in potential energy?
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 May 28th 2009, 05:57 PM #1 Senior Member   Join Date: Mar 2009 Posts: 129 Is the increase in kinetic energy equal to the decrease in potential energy? Is the increase in kinetic energy equal to the decrease in potential energy? Any response would be greatly appreciated! Thanks in advance!
 May 28th 2009, 06:02 PM #2 Senior Member     Join Date: Apr 2008 Posts: 815 Not always in classical mechanics. (I've no idea in relativity). For instance a man starting from rest who begin to run on a plane ground. His kinetic energy will increase while his potential energy will remain constant. But if you're dealing with a mass attached to a spring, of a falling object then the answer to your question is yes. __________________ Isaac If the problem is too hard just let the Universe solve it.

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