A car that weighs 12000.0 N is initially moving at a speed of 30.0 km/hr when the brakes are applied and the car is brought to a stop in 4.1 s. Find the magnitude of the force that stops the car, assuming it is constant. Figured this one out, got: v0 = 8.33 m/s, a = -2.03 m/s^2, F = 2.49 X 10^3 N What distance does the car move during this time? This is the one I'm having trouble with. Using: x(t) = x0 +v0*t + 1/2*a*t^2 and x0 = 0 x(t) = 0 + 8.33(4.6) + 1/2(-2.03)(4.6^2) x(t) = 16.83 m Tells me I am wrong. I don't know what to do from here.