(Solved):   3. The bell crank, which is in equilibrium under the forces shown in the figure, is suppor ...

 

3. The bell crank, which is in equilibrium under the forces shown in the figure, is supported by a pin at D. Determine (a) the required diameter of the connecting rod \( A B \); and (b) diameter of the pin if both are made of AISI 1045 as rolled and the load is repeated and reversed.