10_InstSolManual_PDF_Part22

10_InstSolManual_PDF_Part22 - 10-22 Chapter 10 10.62. Set...

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10.62. Set Up: The free-body diagram for the arm is given in Figure 10.62. Take the pivot at the shoulder joint and let counterclockwise torques be positive. Use coordinates as shown. Let F be the force exerted by the muscle. There are also the weight of the arm and forces at the shoulder joint, but none of these forces produce any torque when the arm is in this position. The forces F and T have been replaced by their x and y components. Figure 10.62 Solve: gives 10.63. Set Up: The weight on the front wheels is the normal force exerted by the ground on the front wheels. The weight on the rear wheels is the normal force exerted by the ground on the rear wheels. When the front wheels come off the ground, The free-body diagram for the truck without the box is given in Figure 11.63a and with the box in Figure 11.63b. The center of gravity of the truck, without the box is a distance x from the rear wheels. Figure 10.63 Solve: in Figure 11.63a gives in Figure 11.63a, with the axis at the rear wheels and counterclockwise torques positive, gives and (a) in Figure 11.63b, with the axis at the rear wheels and counterclockwise torques positive, gives
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This note was uploaded on 03/06/2009 for the course PHYS 114 taught by Professor Shoberg during the Spring '07 term at Pittsburg State Uiversity.

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