1- Determine the maximum magnitude P of the load the beam will support if the average shear stress in each pin is not to allowed to exceed 60 MPa. All pins are subjected to double shear as shown, and 30 each has a diameter of 18 mm. B A --2m - 2m- -2 m- 50 mm 2- The block is subjected to a compressive force of 2 kN. Determine the average normal and average shear 2 KN 2 KN stress developed in the wood fibers that are oriented along section a-a at 30 with the axis of the block. -3 ft -3 ft 500 1b 3- The pins on the frame at D and E each have a diameter of 0.25 in. If these pins are subjected to double shear, determine the average shear 3 ft stress in each pin. 1.5 01 1.5 ft 3 f 300 lb E 40 KN 30 mm 4- The shaft is subjected to the axial force of 40 kN. Determine the average bearing stress acting on the collar C and the normal stress in the shaft