A projectile is launched from a platform 25m above the ground with an initial velocity of (6i+10j)ms−1(6\mathbf{i} + 10\mathbf{j})\text{ms}^{-1}(6i+10j)ms−1.
Find the speed of the projectile after 1 second.
Find the greatest height of the projectile above the ground.
Find the horizontal distance travelled by the projectile before it hits the ground.