Problem 48. The assembly consists of two blocks A and B, which have a mass of 20kg and 30 kg, respectively. If the blocks are released from rest, determine the

speed ofblock B when it descends 1.5 m. Neglect the mass of the pulleys and cords. (а) 1.5 m/s (b) 2.3 m/s (c) 3.4 m/s (d) 4.6 m/s (e) None of these