Block A in (Figure 1) has mass 1.00 kg, and block B has mass 3.00 kg. The blocks are forced together, compressing a spring S between them; then the system is released from rest on a level, frictionless surface. The spring, which has negligible mass, is not fastened to either block and drops to the surface after it has expanded. Block B acquires a speed of 1.60 m/s. Figure 1 of 1 mA = 1.00 kg S mg = 3.00 kg %3D Part A What is the final speed of block A? Express your answer in meters per second. v = m/s Submit Request Answer Part B How much potential energy was stored in the compressed spring? Express your aswer in joules. U = J Submit Request Answer