1. The problem statement, all variables and given/known data a 2000 kg car, after its brakes are locked up, skids and comes to a rest. The coefficient of kinetic friction between rubber and pavement is 0.8. Find deceleration of the car. 2. Relevant equations M= 2000 kg W= mg V= 0 3. The attempt at a solution N= mg = 2000 x 9.8 = 19600 N Fk = N * Mk = 16000 F = ma -Fk = 2000 a .......Where did F go? In most cases I thought F-Fk = ma. Here the F is missing. Is it because the car is skidding? I'm not sure and I was wondering if you guys could help me out.