A playground is on the flat roof of a city school, h = 6.20 m above the street below (see figure). The vertical wall of the building is h = 7.30 m high, to form a 1.1-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 8 = 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. m/s (b) Find the vertical distance by which the ball clears the wall. m (c) Find the horizontal distance from the wall to the point on the roof where the ball lands. m
A playground is on the flat roof of a city school, h = 6.20 m above the street below (see figure). The vertical wall of the building is h = 7.30 m high, to form a 1.1-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 8 = 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. m/s (b) Find the vertical distance by which the ball clears the wall. m (c) Find the horizontal distance from the wall to the point on the roof where the ball lands. m
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A playground is on the flat roof of a city school, h = 6.20 m above the street below (see figure). The vertical wall of the building is h = 7.30 m high, to form a 1.1-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 8 = 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.
m/s
(b) Find the vertical distance by which the ball clears the wall.
m
(c) Find the horizontal distance from the wall to the point on the roof where the ball lands.
m
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