ch13-p041 - r then reducing the size by 1 /3 means...

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41. Let m = 0.020 kg and d = 0.600 m (the original edge-length, in terms of which the final edge-length is d /3). The total initial gravitational potential energy (using Eq. 13-21 and some elementary trigonometry) is U i = – 4 Gm 2 d 2 Gm 2 2 d . Since U is inversely proportional to
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Unformatted text preview: r then reducing the size by 1 /3 means increasing the magnitude of the potential energy by a factor of 3, so U f = 3 U i U = 2 U i = 2(4 + 2 ) Gm 2 d = 4.82 10 13 J ....
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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