1. The problem statement, all variables and given/known data A car on the frictionless track starts from rest at height h. The tracks valley and hill consists of a circular-shaped segments of radius R. What is the maximum height h from which the car can start so as not to fly off the track when going over the hill? Give your answer as a multiple of R. 3. The attempt at a solution ok I know that its potential energy is mgh when we let it go. And we need to put it at least the height of R to make it the top of the hill on the other side. But im not sure how fast it can be going and not lift off the ground. I know that it would have to exceed its weight. Im not sure how to relate the energy into force.