Physics

Problem

A ball is projected at an angle of

30^{\circ}

from the top step of a staircase with a velocity of

12.5\,\text{m/s}

. Each step is

0.2\,\text{m}

high and

0.4\,\text{m}

wide. Which step number will the ball hit first? (Assume the top step edge is origin

(0,0)

and steps descend).