In the figure below, a stone is projected at a cliff of height h with an initial speed of 44m/s directed 60° above the horizontal. The stone strikes at A, 5.8s after launching.

Question

(a) Find the height, h, of the cliff.
(b) Find the speed of the stone just before impact at A.
(c) Find the maximum height H reached above the ground.

Answer 1

I gave you the recipe for projectile motion. Please do the problems. I do not need the practice. You do.
https://www.jiskha.com/display.cgi?id=1518823195#1518823195.1518825578

Answer 2

You may find you need to solve quadratics here and there in projectile problems. Here is a calculator:
https://www.mathsisfun.com/quadratic-equation-solver.html