Sunday

April 20, 2014

April 20, 2014

Posted by **Anonymous** on Tuesday, September 25, 2012 at 9:26pm.

(a) The first balloon launched by the Jackson team hits Walton dorm 1.8 s after launch, striking it halfway between the ground floor and the roof. Find the direction of the balloon's initial velocity. Give your answer as an angle measured above the horizontal.

- physics -
**anon**, Wednesday, March 6, 2013 at 1:56amt = 1.8

x = 36 meters

y = -3.75 meters

Vox = x/t = 36/1.8

Vox = 20 m/s

Vox = VocosƟ

20 = VocosƟ

Vo = 20/cosƟ

Voy = Vo + at

y = Voyt + 0.5at2 = -VosinƟ -4.9t2

-3.75 = (20/cosƟ)sinƟt -4.9t2 <----plug in t = 1.8

-3.75 = (20)(2)tanƟ - (4.9)(3.24)

Ɵ = 16.86 degrees

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