The calculation of braking distance:
s: total braking distance [m] (s=sR+sF)
sR: perception reaction distance [m]
sF: braking deceleration distance [m]
Perception reaction distance:
sR=(v/3.6)tR/3.6
v: speed of vehicle [km/h]
tR: reaction time [s]
To reduce the kinetic energy to zero:
µmgsF=m(v/3.6)2/2
µ: coefficient of friction [ ] (between the tires and the road)
m: mass of vehicle [kg]
g: acceleration of gravity [9.81 m/s2]
it follows:
sF=(v/3.6)2/2µg=0.004v2/µ
The total braking distance:
s=sR+sF
A. reaction
B. perception
C. decision
D. action