A 45 kg block lies on a flat table and 30 kg weight hanging vertically and attached to it by means of a cord passing over a frictionless pulley fixed at the edge of table. Acceleration of block is (g = 10 m/s2)
16 m / s2 or ms-2
8 m / s2 or ms-2
4 m / s2 or ms-2
2 m / s2 or ms-2