Physics

Problem

A trolley is moving at

5\,\text{m/s}

on a straight track. It accelerates uniformly and after travelling

40\,\text{m}

its speed becomes

15\,\text{m/s}

. If the same acceleration continues, what will be its speed after it has moved another

20\,\text{m}

? a)

20\text{ m/s}

16\text{ m/s}

22\text{ m/s}

18\text{ m/s}