For the cross section at = 8 ft, determine the value of y’ at which the magnitude of the average shear stress is a maximum. (Notice that the maximum magnitude does not occur at the neutral axis.)...

For the cross section at

= 8 ft, determine the value of
y’ at which the magnitude of the average shear stress is a maximum. (Notice that the maximum magnitude does not occur at the neutral axis.) What is the maximum magnitude?

For the cross section at

= 4 ft, determine the average shear stress (a) at the neutral axis and (b) at
y’ =
2 in.