A rod P Q of mass M and length L is hinged at end P . The rod is kepts horizontal by a massless string tied to point Q as shown in figure. When string is cut, the initial angular acceleration of the rod is

Step-by-step solution

Torque on the rad = Mament of weight of the rod about =m g 1 2 Moment of inertia of rod about P= M L^2 3 As =1 From Eqs. (i) and (ii), we get aligned & M g L 2 = M L^2 3 & = 3 g 2 L aligned