Block A in the figure (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 1.40 m/s Figure What is the final speed of block A? < 1 of 1 > Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining m=1.00 kg mg-3.00 kg S Part B m/s How much potential energy was stored in the compressed spring? U- ? J