A playground is on the flat roof of a city school, 6.00m above the street below. The vertical wall of the building is h=7.00 high, forming a 1-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by launching it at an angle of theta=53.0 degrees above the horizontal at a point d=24.0m from the base of the building wall.
(a) find the speed at which the ball was launched
(b) Find the vertical distance by which the ball clears the wall.
(c) find the horizontal distance from the wall to the point on the roof where the ball lands.

Question

A playground is on the flat roof of a city school, 6.00m above the street below. The vertical wall of the building is h=7.00 high, forming a 1-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by launching it at an angle of theta=53.0 degrees above the horizontal at a point d=24.0m from the base of the building wall. 
(a) find the speed at which the ball was launched
(b) Find the vertical distance by which the ball clears the wall.
(c) find the horizontal distance from the wall to the point on the roof where the ball lands.

anonymous · Answer

Ok, so I found part (a) and part (b) but i cant seem to figure part (c)

anonymous · Answer

to find part c all you have to do is find the horizontal average velocity then multiply by the time the ball was in the air. This is due to how vertical and horizontal movement are separate entities.