359_Physics ProblemsTechnical Physics

359_Physics ProblemsTechnical Physics - Chapter 12 (c) To...

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Chapter 12 361 (c) To find R we can work out RRR 22 2 cos sin θθ += . From the expressions above for R cos θ and R sin , RT T T T Rx x x 222 2 2 2 2 2 2 12 53 53 1 600 53 800 1 600 53 640 000 93 9 125 1 278 93 9 125 640 000 8 819 96 482 495 678 + ° ° + =− ° + =+ + + + cos sin sin sin .. N N a f a f a f ej At x = 0 this gives R = 704 N . At x = 2 m , R = 581 N . At x = 8 m, R = 537 N . Over the range of possible values for x , the negative term 96 482 x dominates the positive term 8819 2 x , and R decreases as x increases. Section 12.4 Elastic Properties of Solids P12.27 F A Y L L i = L FL AY i == ×× = 200 9 80 4 00 0200 10 800 10 490 41 0 a f af e j .
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