what is the average force needed to stop a car traveling 28m/s in 55m?
V^2 = Vo^2 + 2a*d.
a = (V^2-Vo^2)/2d
a = (0-28)/110 = -0.255 m/s^2.
F = m*a = m * (-0.255).
a = (V^2-Vo^2)/2d
a = (0-28)/110 = -0.255 m/s^2.
F = m*a = m * (-0.255).