A car is travelling on a straight road

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A car is travelling on a straight road. Its maximum velocity is

24\,\text{m s}^{-1}

. Its maximum acceleration and deceleration are

1\,\text{m s}^{-2}

and

4\,\text{m s}^{-2}

, respectively. The shortest time it takes to travel from rest to rest over a distance of

200\,\text{m}

is: (1)

22.4\,\text{s}

(2)

30\,\text{s}

(3)

11.2\,\text{s}

(4)

5.6\,\text{s}