05_InstSolManual_PDF_Part22

# 05_InstSolManual_PDF_Part22 - 5-22 Chapter 5 5.48 Set Up...

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5.48. Set Up: Use coordinates where is upward and is horizontal to the right. The applied force pushes to the left so the friction force is to the right. Solve: (a) The free-body diagram is given in Figure 5.48. The applied force has been replaced by its x and y components. Figure 5.48 (b) gives and (c) gives and (d) The maximum possible static friction force is (e) The vertical component of F is now upward. now gives 5.49. Set Up: Solve: (a) must have units of N, so D has units (b) At the terminal velocity, and and 5.50. Set Up: with Solve: (a) At the terminal velocity, and and (b) 5.51. Set Up: Solve: (a) At the terminal speed (b) When (c) When Reflect: At the terminal velocity the upward drag force equals the downward gravity force and the acceleration is zero. At speeds less than the upward drag force is less than the weight and the person accelerates downward. 5.52. Set Up: Similar objects have the same size and shape and therefore the same D in For an object of weight W , and Solve: (a) so (b) so (c) so v t 5 " 4 V T 5 2 V T . D v t 2 5 4 W v t 5 " 3 V T . D v t 2 5 3 W v t 5
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