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The rectangular piece of wood, 50 mm by 100 mm, is used as a compression block. The grain of the wood makes a 20

The rectangular piece of wood, 50 mm by 100 mm, is used as a compression block. The grain of the wood makes a 20 angle with the horizontal, as shown in the figure. Determine the largest axial force P that can be applied safely if the allowable stresses on the plane of the grain are 18 MPa for compression and 4 MPa for shear. 100 mm 20

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