In the figure below, a stone is projected at a cliff of height h with an initial speed of 42.0 m/s directed at an angle = 60.0° above the horizontal. The stone strikes at A, 5.50 s after launching. Find

(i) the height h of the cliff

(ii) the speed of the stone just before impact at 4, and

(iii) the maximum height H reached above the ground.

**The Solution**