Physics

Problem

A ball is kicked from level ground with an initial speed of

20\,\text{m/s}

at an angle of

30^{\circ}

above the horizontal. Neglect air resistance and take

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

. What is the total time the ball spends in the air before returning to its launch height? a)

3.5\,\text{s}

2.0\,\text{s}

4.1\,\text{s}

1.0\,\text{s}