A truck starts from rest at station

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

Problem

A

, accelerates uniformly at

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

for

t

seconds, then moves with the speed reached for

60\,\text{s}

, and finally comes to rest at station

B

by decelerating uniformly at

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

. If the distance between

A

and

B

3.6\,\text{km}

, find the value of

t

. (a)

18\,\text{s}

(b)

22\,\text{s}

(c)

20\,\text{s}

(d)

40\,\text{s}