A particle P P\,P is projected with a velocity (6i+8j)ms−1(6\mathbf{i} + 8\mathbf{j})\text{ms}^{-1}(6i+8j)ms−1 from a point 15m above the ground.
Find the speed of the particle after 2.5 seconds.
Find the greatest height of PPP.
Find the horizontal distance travelled by P P\,P before it hits the ground.