1. The problem statement, all variables and given/known data A passenger car has a speed of 16.8 m/s when it reaches point A. The average frictional force between the car and the track from point A to B is 250N. At point B in addition to this frictional force, the car's breaks are applied so that the passenger car stops at point B. Question: What additional force that must be applied by the breaks between point A and B in order to stop the car at point B? 2. Relevant equations Ek=1/2mv^2 3. The attempt at a solution EK is all I know.