A particle P P\,P is projected with speed Ums−1U\text{ms}^{-1}Ums−1 from the point AAA, 20m above the ground. P P\,P is projected at an angle of 60∘ 60^\circ\,60∘ to the horizontal. B B\,B is the greatest height of PPP, 16m above AAA.
Find the value of UUU.
Find the horizontal distance travelled.
Find the speed of the ball when it hits the ground.