Physics

Problem

A ball is thrown vertically upward from ground level with a speed of

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

. Taking

g = 9.8\,\text{m s}^{-2}

downward, its height above the point of projection after

3\,\text{s}

is closest to a)

15.0\,\text{m}

15.9\,\text{m}

44.1\,\text{m}

60\,\text{m}