I need help with this question: A 1600.3 kg car is traveling at 26.4 m/s when the driver takes his foot off the gasd pedal. It takes 4.5 s for the car to slow down to 20 m/s. How large is the net force slowing the car? Answer in units of N. I suck with forces and I have no idea how to do this. Can someone please help me out?