question_answer

In which of the following cases shown in Fig. 5(b).28, it is most difficult to rotate the rod? Explain why?

Answer:

                  In Fig . 5(b).28, moment of inertia (I) of the rod is maximum in case of (c). Work required to rotate the rod, (a)                    (b)               (c)           \[W=\frac{1}{2}I{{\omega }^{2}}\]is maximum in case of (c).