A car is traveling at a speed of 22.4 m/s and skids to a stop in 2.55 s. So we have following information:
Initial speed of the car i.e u= 22.4 m/s
Final speed of the car i.e. v=0 m/s ( because car stops)
Time taken to come to stopping position t= 2.55 sec
We wish to determine an acceleration (which is in fact a retardation) a=?
We have equation of the motion
Before car stops it will travel 28.56 m.