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Block A in the figure below has a mass mA = 5.00 kg, and block B has a mass mB = 8.00 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 1.20 m/s (a) What is the final speed of block A? m/s (b) How much potential energy was stored in the compressed spring? J

Block A in the figure below has a mass mA = 5.00 kg, and block B has a mass mB = 8.00 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 1.20 m/s (a) What is the final speed of block A? m/s (b) How much potential energy was stored in the compressed spring? J

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Block A in the figure below has a mass m A = 5.00 k g , and block B has a mass m B = 8.00 k g . 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 1.20 m / s (a) What is the final speed of block A? m / s (b) How much potential energy was stored in the compressed spring? J

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