Question

a car traveling with initial velocity of 22.4 m/s skids to a stop in 22.5 displacement. What is the skidding displacement of the car

Answer 1

Given:

$v_i=22.4\:{\rm m/s},\quad v_f=0.$

$d=22.5\:\rm m$

The displacement

$$d=\frac{v_f^2-v_i^2}{2a}$$

Hence, the acceleration

$$a=\frac{v_f^2-v_i^2}{2d}=\frac{0^2-22.4^2}{2*22.5}=-11.2\:\rm m/s^2$$