Two cars start simultaneously from rest at opposite ends of a straight track and move…

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

Problem

Two cars start simultaneously from rest at opposite ends of a

500\,\text{m}

straight track and move towards each other. Car P has a uniform acceleration of

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

and car Q has a uniform acceleration of

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

. After how many seconds from the start will the cars cross each other? (a)

20\,\text{s}

(b)

10\,\text{s}

(c)

14\,\text{s}

(d)

18\,\text{s}