A thin uniform ring, placed on a knife edge pivot executes SHM period 'Tr'.
The same ring is cut, then straightened to form a bar, which executes SHM with a period 'Tb'.
Find the ratio of periods, Tb/Tr.
Step1. Recall moments of inertia as follows:
Thin uniform ring about its c.m. axis (at center): (1) Io ...
Compare period of ring to that of bar.