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# projectiles!!

Registered User Posts: 20 New Member
edited October 2012
A playground is on the flat roof of a city school, 5.6 m above the street below (see figure). The vertical wall of the building is h = 7.10 m high, forming a 1.5-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.

here is the picture : http://www.webassign.net/serpse8/4-p-019.gif

(a) Find the speed at which the ball was launched. (Give your answer to two decimal places to reduce rounding errors in later parts.)
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

i solved the first one correct as 17.5; i tried to solve the other two as 33.7 and 9.7 but i got it wrong adn i don't know why?
Post edited by Magaxx2 on

## Replies to: projectiles!!

• Registered User Posts: 5,936 Senior Member
I didn't get any of those answers that you gave.

BTW, against forum rules to ask for homework help here.
This discussion has been closed.