The bell-crank mechanism is in equilibrium for an applied load of P = 40 kN. Assume that a = 300 mm, b = 245 mm, and 0 = 61°. The pin at B has a diameter of d = 12 mm, and the bell crank has a thickness of t = 12 mm. Calculate the average shear stress in the pin at B. (1) P Answer: Bell crank A a C B Support bracket b F₁ IF B

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