In coming to a stop, a car leaves skid marks 97.0 m long on the highway. Assuming a deceleration of 6.60 m/s2, estimate the speed of the car just before braking.

(in m/s)

3 answers

d = (1/2) a t^2

194 = 6.60 t^2
solve for t
then
v = Vi - 6.60 t = 0 at end
Vi = 6.60 t
44ms^1
Sorry it was a typing error