Physics

Problem

A car’s speed increases from

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

t = 2\,\text{s}

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

t = 7\,\text{s}

. Calculate its average acceleration during this interval. a)

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

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

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

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