1. The problem statement, all variables and given/known data Two heavy frictionless carts are at rest. They are held together by a loop of string. A light spring is compressed between them. When the string is burned, the spring expands from 2 cm to 3 cm, and the carts move apart from one another. Both hit the bumpers fixed to the table at the same instant, but cart A moved 0.45 metre while cart B moved 0.87 metre. What is the ratio of : A. The speed of A to the of B after the interaction? B. Their masses? C. The impulses applied to the carts? D. The accelerations of the carts while the spring pushes them apart? 2. Relevant equations This is an Explosion, therefore momentum before is going to be 0. 0 = m1v1 + m2v2. The impulse will also equal 0 Ft = 0. 3. The attempt at a solution Well I wish I knew where to being, right now the only that I can think about is the displacement of the respective carts, and that they hit at an instant. But I cannot figure out much on the ratio and the solution. Any help would be appreciated. Thank You.