how many A car is traveling at 50 mi/hr when the brakes are fully applied, producing a constant deceleration of 22ft/s2. What is the distance (in feet) covered before the car comes to a stop

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other