For the block-and-wedge system shown in Figure 6-17, calculate the force P required to initiate upward motion of the block. The block supports a load of 700 lb, the slope angle of the wedge is 9°, and the coefficient of static friction on the two surfaces of the wedge is 0.25. The vertical surface (C–C) is friction-less. Compare the result with Example 6-7.
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