# A car moving along a straight highway with speed $126\;km/hr$ is brought to a stop with in a distance of 200 m . ?What is the retardation of the car, and how long does it take for the car to stop .
$\begin{array}{1 1} (a) \;11.44\;s \\ (b) \;20.61\;s \\ (c) \;14.2\;s \\ (d) \;15.0\;s\end{array}$