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193_Physics ProblemsTechnical Physics

193_Physics ProblemsTechnical Physics - Chapter 7 P7.10 e...

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Chapter 7 195 P7.10 A B i j k i j k = + − − + + 3 00 2 00 5 00 . ± ± ± ± . ± . ± e j e j A B i j k C A B j k i j k = = = + − + + = 4 00 6 00 2 00 3 00 4 00 6 00 0 2 00 18 0 16 0 . ± ± . ± . ± . ± . ± ± . ± . . . a f e j e j a f a f Section 7.4 Work Done by a Varying Force P7.11 W Fdx i f = = z area under curve from x i to x f (a) x i = 0 x f = 8 00 . m W = area of triangle ABC AC = F H G I K J × 1 2 altitude, W 0 8 1 2 8 00 6 00 24 0 = F H G I K J × × = . . . m N J (b) x i = 8 00 . m x f = 10 0 . m W = area of CDE CE = F H G I K J × 1 2 altitude, W 8 10 1 2 2 00 3 00 3 00 = F H G I K J × × − =
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