A stone must be projected horizontally from a point P, which is h meter above the foot of a plane inclined at an angle `theta` with horizontal form a point P , which is h meters above the foot of a plance inclined at an angle `theta ` with horizontal as shown in figure . Calculate the velocity v of the stone so that in may hit the incline plane perpendiculary.

Explanation

`v = sqrt(2gh)/(2+cot^(2) theta)`