F9-6. Locate the centroid z of the homogeneous solid formed by revolving the shaded area about the z axis.

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A joint is made by gluing two plywood gussets of thickness t to wood boards. The tensile working stresses are 1400 psi for the plywood and 900 psi for the boards. The working shear stress for the glue is 60 psi. s are a. Determine the dimension b (inch.) so that the joint is as strong as the boards. c. 11.67 а. 38.33 1.75 in. b. 12.25 d. 13.13 b. Determine the dimension t (inch.) so that the joint is as strong as the boards. 5.75 in. с. 1.50 d. 0.510 a. 0.563 b. 1.60 Ans.(a): Ans.(b):