1. The problem statement, all variables and given/known data While learning to drive,you are in a 1200 kg car moving at 20.0m/s across a large,vacant,level parking lot.Suddenly you realize you are heading straight toward the brick sidewall of a large supermarket and are in danger of running into it.The pavement can exert a maximum horizontal force of 7000N on the car. Explain why you should expect the force to have a well-defined maximum value. 2. Relevant equations 3. The attempt at a solution The answer state that the maximum value determined by the surface roughness.Why the roughness of the road make the force well-defined?