A lightweight spring with spring constant k = 225 N/m is attached to a block of mass m1 = 4.5 kg on a frictionless, horizontal table. The block-spring system is initially in the equilibrium configuration. A soceond block of mass m2 = 3.00 kg is then pushed against the first block, compressing the spring by x = 15.0 cm as in the figure. When the force on the second block is removed, the spring pushes both blocks to the right. The block m2 loses contact with the spring-block 1 system when the block reach the equilibrium configuration of the spring. What is ths subsequent speed of block 2?
