1. The problem statement, all variables and given/known data Driver brakes 1420kg car moving at 64.8km/h [W]. Car slows down and comes to stop after 729m [w] find net force 2. Relevant equations a=v/t f=ma 3. The attempt at a solution t=40.5 a= 0.44 f=1420(0.44) f= 624.8 My answer is 624.8N TB Answer: 316N what am i doing wrong?