2010 utility equipment basic examination questions it
First force analysis as shown in the figure:
On the B point force analysis: ∑M=0 : FL-FA.L/2=0 solution FA = 2F
On the A point force analysis: ∑M=0: FB.L/2-F.(L + L/2)=0 solution FB = 3F
See B The maximum shear stress received at the point is F
Looking at the answer, the one that's a multiple of 3 is probably the one, and it's great that this one is unique. Choose C
Specific solution:
τ=3F/(πd?/4)=12F/πd?