Physics

Problem

A stone is projected vertically upward with speed

20\,\text{m/s}

. Neglecting air resistance and taking

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

, calculate its total time of flight before it returns to the point of projection. a)

5.1\,\text{s}

4.0\,\text{s}

4.1\,\text{s}

2.0\,\text{s}