05_InstSolManual_PDF_Part4

05_InstSolManual_PDF_Part4 - and so Figure 5.9(b The...

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5.8. Set Up: For each muscle where Use coordinates where is along the Achilles tendon. The force exerted by each muscle then makes an angle of with the axis. Apply the equilibrium conditions to the point where the muscles attach to the tendon. The free-body diagram is given in Figure 5.8. T is the tension in the tendon. Figure 5.8 Solve: gives 5.9. Set Up: Use coordinates where is upward and is to the right. The force at the foot is horizontal. The tension T in the cable that has one end attached to the leg and the other end attached to the weight is equal to W and is the same everywhere along the cable. Solve: (a) The free-body diagram for the leg is given in Figure 5.9a. is the traction force on the leg. gives
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Unformatted text preview: and so Figure 5.9 (b) The free-body diagram for the pulley that is attached to the foot is given in Figure 5.9b. gives so Reflect: The tractive force on the leg is greater than W . F T 5 2 T cos 25° 5 85.2 N. 2 T cos 25° 2 F T 5 g F x 5 ( b ) x y T T T sin25° T sin25° T cos25° T cos25° 25° 25° F T ( a ) T F T x y w W 5 47.0 N. T 5 w 5 47.0 N T 2 w 5 g F y 5 F T 1 x 1 y T 5 2 F max cos 22.5° 5 1700 N. F max 5 s A 5 1 3.0 3 10 5 N / m 2 21 3.0 3 10 2 3 m 2 2 5 900 N. T 5 2 F max cos 22.5° 5 g F y 5 F max ,y F max ,y 22.5 ° 22.5 ° F max F max T x y 1 y 22.5° F S max 1 y 30 cm 2 5 3.0 3 10 2 3 m 2 . s 5 3.0 3 10 5 N / m 2 . F max 5 s A , 5-4 Chapter 5...
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