A playground is on the flat roof of a city school, 7.00 m above the street below

Question

A playground is on the flat roof of a city school, 7.00 m above the street below. The vertical wall of the building is 8.00 m high, forming a 1.00 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 53.0 above the horizontal at a point 27.0 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.
m/s

(b) Find the vertical distance by which the ball clears the wall.
m

(c) Find the distance from the wall to the point on the roof where the ball lands.
m

Explanation / Answer

a) 19.9 m/s b) how long does it take to get to the wall plane? time= 24/(19.9cosTheta) C) Now using that time.. vertical height= 19.9sinTheta*t-1/2 g t^2 and clearance is that minus 8m

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