1. The problem statement, all variables and given/known data A 1 kg cart is at the top of a frictionless ramp as shown. It rolls down and makes an elastic collision with a stationary 3 kg cart at the bottom. The spring constant is 400 N/m. What is the maximum compression of the spring? How far up the ramp will the first cart travel after the collision? 3. The attempt at a solution I got part a, but I don't know how to do part b. Thanks!