1. The problem statement, all variables and given/known data A 1200 car traveling at 110 km/h comes to a stop in 8.0 seconds. Assume that the acceleration is constant. What force is required to stop the car? 2. Relevant equations F=ma a=Δv/Δt 3. The attempt at a solution First I converted so that I could give the answer in Newtons. v=30m/s m stays the same. T=8 seconds a=Δv/Δt a= 3.75 m/s^2 At this point, I think either my unit conversion or my equation was wrong,as 3.75 m/s^2 seems somewhat slower than usual for a physics problem involving a car. But continuing with the problem, I get 450 Newtons. I'm new to Newtons, so I don't know if this is a reasonable answer. Could I please get a confirmation? Thanks!