In the system shown below, the spool has a mass of 10kg and radius of gyration of 120 mm, and blocks A and B have the mass of 15kg and 5kg, respectively. At the moment shown, the spring is un-stretched. If the initial velocity of block A is 2m/s, determine its velocity when it goes down by 250 mm. r1 = 100 mm r2 = 150 mm V = 2 m/s B k = 100 N/m www