1. The problem statement, all variables and given/known data A uniform rod of length L & mass m is suspended through an end. It is shifted through an angle of π/2 radian i.e. made horizontal and then released. Find angular velocity when rod is vertical. 2. Relevant equations 3. The attempt at a solution My attempt to a problem is attached with this post. But Solution says By energy conservation law 1/2 I ω2= mg L/2 (ω = angular velocity) Hence ω=√ (3g/L) Which one is correct? N why other is wrong?