1. The problem statement, all variables and given/known data With what frictional force must the road push on a 1200 kg car if the driver exceeds the speed for which the curve was designed by deltav = 14km/hr? 3. The attempt at a solution I actually have no clue where to begin with this question. Don't I need the radius to figure this out? On the previous problem i was asked to find the bank angle of a curve given radius and velocity and I used tan-1 [v^2/(gr)]. I don't believe that equation is relavent here though. Any advice as to what equations I should be using?