Physics

Problem

A cricket fielder throws a ball with speed

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

so that it lands on level ground

30\,\text{m}

away. Take

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

. The possible projection angle(s) with the horizontal are a)

41^{\circ}

and

49^{\circ}

45^{\circ}

only c)

24^{\circ}

and

66^{\circ}

23^{\circ}

and

67^{\circ}