Posted by Anonymous on Sunday, November 27, 2011 at 7:55pm.
a projectile is launched straight up with an initial velocity of 112 feet per second. how long would it take to reach 180 feet?

physics  Henry, Monday, November 28, 2011 at 8:21pm
d = Vo*t + 0.5g*t^2 = 180,
112t  16t^2  180 = 0,
Divide both sides by 4:
28t  4t^2  45 = 0,
4t^2 + 28t  45 = 0.
X = 2.5s. Use Quadratic Formula and use
the smaller of the 2 solutions.
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