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A rectangular piece of wood, 50 mm by 100 mm in cross section, is used as a compression block shown in Fig. P-123. Determine

A rectangular piece of wood, 50 mm by 100 mm in cross section, is used as a compression block shown in Fig. P-123. Determine the axial force P that can be safely applied to the block if the compressive stress in wood is limited to 20 MN/m and the shearing stress parallel to the grain is limited to 5 MN/m. The grain makes an angle of 20 with the horizontal, as shown. (Hint: Use the results in Problem 122.)

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