If the beam in Problem 1 is of a circular cross section, how would the diameter of this be...

If the beam in Problem 1 is of a circular cross section, how would the diameter of this beam need to be changed along the length if one were to design it for constant bending stress?

Problem 1

If the cantilever beam shown in Fig. 1 is shortened until the effect of transverse shear is equal to the effect of maximum bending stress, what will be the length of the beam? What general guideline could you conclude about when it is important to consider the effects of transverse shear on a cantilever beam?

Figure 1