A playground is on the flat roof of a city school, hb = 5.40 m above the street below (see figure). The vertical wall of the building is h = 6.80 m high, to form a 1.4-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) Find the speed at which the ball was launched.
Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully. m/s
(b) Find the vertical distance by which the ball clears the wall.
Your response differs from the correct answer by more than 10%. Double check your calculations. m
(c) Find the horizontal distance from the wall to the point on the roof where the ball lands.