A 2.5 x 10^3 kg car os travelling due west at 30m/s when the brakes are applied, exerting a force of 5.0 x 10^3 [E]. What is the cars acceleration due to braking? umm I do not know how to do this but i do know Net Force = ma. Thus Fapp - Ffric = ma. How do you figure out the applied force so i can determine the acceleration help.