1. The problem statement, all variables and given/known data "The constant force resisting the motion of a car of mass 1500kg is 980N. If, when travelling at 48kmhr-1, the car is brought to rest in a distance 50m by applying the brakes, find the additional retarding force due to the brakes (assumed constant) 2. Relevant equations SUVAT: v2=u2+2as, rearranged to a=(v2-u2)/2s Newton's Second Law: F=ma 3. The attempt at a solution I used suvat (s=50m , u=48kmhr-1=13.3ms-1 [3.S.F.] , v=0ms-1 , a=a , t=t) to calculate the deceleration as 1.77ms-2 [3.S.F.], I then used F=ma, and found the force to be 2655N, is this right?