shows two blocks, each of mass m, suspended from the ends of a rigid weightless rod of length L1+L2 with L1 = 20 cm and L2 = 80 cm. The rod is held horizontally on the fulcrum and then released.
(a) What is the magnitude of the initial acceleration of the block closer to the fulcrum.
(b) What is the magnitude of the initial acceleration of the other block?