1. The problem statement, all variables and given/known data In Figure 6-58, a stuntman drives a car (without negative lift) over the top of a hill, the cross section of which can be approximated by a circle of radius R = 211 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill? 2. Relevant equations Ac = mv^2/R fnet = ma 3. The attempt at a solution I honestly have no idea how to tackle this problem. Help?