If a car that moves at 20km/h skids 35m with locked brakes. How far will the same car skid with locked brakes if it is traveling at 80km/h?

Answer 1

Vi = 20km/h = 5.556 m/s , Vf =0

Vf² = Vi² +2aS

Vf =0

Vi² = -2aS

S = 35 m

a= - 0.44m/s2

Now Vi =80km/h = 22.22m/s

Vf = 0

S = 22.22*22.22/0.44 = 1122.1m