392_Physics ProblemsTechnical Physics

392_Physics ProblemsTechnical Physics - 394 P13.37...

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394 Universal Gravitation P13.37 FF cG = gives mv r GmM r E 2 2 = which reduces to v GM r E = and period == 2 2 π r v r r GM E . (a) rR E =+ = + = 200 6 370 200 6 570 km km km km Thus, period m m Nm kg kg s m i n h 22 × ×⋅ × = = 2 6 57 10 657 10 6 67 10 5 98 10 530 10 883 147 6 6 11 24 3 . . .. . ej e j T (b) v GM r E × × = 6 67 10 5 98 10 779 11 24 6 . . m km s e j (c) KUKU ffi i += + + energy input, gives input =−+ F H G I K J F H G I K J 1 2 1 2 mv mv GM m r GM m r fi
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