Homework Help: Physics

Posted by josephz on Friday, September 21, 2012 at 12:29am.

A group of engineering students constructs a slingshot to launch water balloons. The angle of launch is 30° and the initial velocity of the balloon is 14 m/s. The students launch a balloon from the roof of a building and the balloon lands 42 m away from the building. How tall is the building?

Physics - Aljebeth D. Tura, Saturday, September 22, 2012 at 9:47am
use the formula

y=xtanθ-(g*X^2)/(2*v^2*Cos^2θ)

since it is on he roof,take y=-y=-H=height of the building

where x=42m
θ=30
V=14m/s

note: θ is not included in the exponent 2..just plug-in the value..

God Bless !!!

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