(a) In the system shown in figure 1, the uniform rod of length L and mass m is free to rotate in vertical plane about point O. The string an pulley are mass less. The block has mass equal to that of the rod. Find the acceleration of the block immediately after the system is released with rod in horizontal position.
(b) System shown in figure 2 is similar to that in figure 1 apart from the fact that rod is mass less and a block of mass m is attached to the centre of the rod with the help of a thread. Find the acceleration of both the blocks immediately after the system is released with rod in horizontal position.

Answer

(a) `(3g)/(8)`
(b) `(2g)/(5) " and " (g)/(5)`