1. The problem statement, all variables and given/known data In a test the total braking force on the car of mass 1000kg was measured on a straight, level road. The figure below shows the resultant force on the car as a function of time from the instant the brakes were apploed (t=0s). The car came to a stop after 10s. http://img412.imageshack.us/img412/2132/asdfem1.png [Broken] a) what is the magnitude of the change in momentum of the car from 0 to 10 seconds? b) what was the intial speed of the car at t=0s? 3. The attempt at a solution I'm not sure what to apply/where to start Somebody please guide me through? Thanks in advance!