A projectile is fired with an initial speed of 22.0m/s at an angle of 55.0deg above the horizontal. The object hits the ground 10.0s later.
1) How much higher or lower is the launch point relative to the point where the projectile hits the ground?
2) To what maximum height above the launch point does the projectile rise?
3) What is the magnitude of the projectile's velocity at the instant it hits the ground?
4) What is the direction (below +x) of the projectile's velocity at the instant it hits the ground?