Question

Select One Option Correct from the following : A metal rod of length L and mass m is pivoted at one end. A thin disk of mass M and radius R (< L) is attached at its centre to the free end of rod. Consider the two ways the disk is attached. (Case A) The disc is not free to rotate about its centre, and (Case B ) the disc is free to rotate about its centre. The rod-disc system performs SHM in vertical plane after being released from the same displaced position. Which of the following statement(s) is (are) true?
(A)restoring torque in case A = restoring torque in case B.
(B)restoring torque in case A < restoring torque in case B.
(C)Angular frequency of case A > Angular frequency of case B.
(D)Angular frequency of case A < Angular frequency of case B.

Answer 1

Answer:

D is the correct answer