(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Picture link

http://i1120.photobucket.com/albums/l498/LaLadude/2.jpg

How long does it take to reach the ground? And what is the angle of impact with the ground?

2. Relevant equations

3. The attempt at a solution

Δy = Vo_{y}* t + (1/2)a_{y}* t^{2}

t = (-5 m/s) ± √(5 m/s)^{2}- 4(1/2)(-9.81 m/s^{2})(-100m) / 2(1/2)(-9.81 m/s^{2})

t = -5 m/s ± (4.54)

Is it suppose to be 4.54 or -4.54? And am I suppose to add or subtract the two variables to find t??

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# Homework Help: Physics, find the time it takes.

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