Physics

Problem

A ball is projected with speed

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

at an angle of

30^{\circ}

to the horizontal. Taking

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

, determine the slope

\dfrac{dy}{dx}

of its trajectory when its horizontal displacement is

15\,\text{m}

. a)

0.58

-0.49

0.09

0.21