A playground is on the flat roof of a city school, 5.3 m above the street below (see figure). The vertical wall of the building is h = 6.50 m high, forming a 1.2-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 ϴ= 53.0°; above the horizontal at a point d= 24.0 m from the base of the building wall. The ball takes 2.20 s to reach a point vertically above the wall.
a) What is the initial speed at which the ball was kicked?
b) What is the vertical distance above the wall in which the ball passes?
c) What is the horizontal distance from the wall to the point on the roof where the ball lands?
