Physics

Problem

A ball is thrown from ground level with a speed of

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

making an angle of

30^{\circ}

with the horizontal. Take

g = 10\,\text{m}\,\text{s}^{-2}

. Calculate the total time of flight of the ball. a)

3.5\,\text{s}

1.0\,\text{s}

2.0\,\text{s}

2.5\,\text{s}