Acannon is fired from a castle wall at some unknown height above the ground. the cannonball leaves the cannon with speed 30.0m/s at angle 30° above the horizontal and hits the level ground at a horizontal distance 100m from the wall.
a) calculate the time it takes the cannon ball to hit the ground.
b) calculate the height of the castle wall.
c) what are the x- and y-components of the cannon ball’s velocity at the highest point of its trajectory?
d) what are the x- and y-components of the cannon ball’s velocity just before it hits the ground?
e) sketch, qualitatively, x-t, y-t, vx-t and vy-t graphs for the cannon ball’s motion.