Physics

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}

10\,\text{s}

14\,\text{s}

18\,\text{s}