1. The problem statement, all variables and given/known data Two carts have a spring of negligible mass compressed between them. The spring has a force constant of 8000 N/m and is compressed 0.05 m from equilibrium. Cart 1 has a mass of 1.3 kg and cart 2 has a mass of 0.5 kg. What is the speed of cart 1? What is the speed of cart 2? 2. Relevant equations p=mv F=ma U=(.5)kx^2 K=(.5)mv^2 F=kx 3. The attempt at a solution F=kx F=400 400 = (.5)m1v1^2 + (.5)kx^2 800 = m1v1^2 + kx^2 780 = m1v1^2 v1 = 24.494 m/s but it's wrong.. anyone can help me?