1. The problem statement, all variables and given/known data A 1326kg car lies on a flat surface. To make it move very slowly (a~0), one needs a force of 160N parallel to the surface. To stop it, the force must be reduced to 120N. 2. Relevant equations Calculate the friction forces of the car On Tuesday I have an exam regarding this and related topics. I missed some classes due to sickness and now I am a little lost. Thanks in advance!