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Re: Physics isn't tight
it's initial velocity is 15.9m/s, at an angle of 38 degrees.
first you find the vertical component of the velocity:
d = Vot + 1/2 a t^2
4.90 = Vo(1) + 1/2 (9.8) (1)^2
Vo = 4.90 + 4.90 = 9.8
the time is 1 because it only takes half the time to get to the top
then you find the horizontal component of the velocity:
V = d/t
V = 25/2
V = 12.5
then use pythagorean theorem to find the actual velocity
V = sqrt (9.8^2 + 12.5^2)
V = 15.9
use your trig ratios to find the angle
tanX = opposite/adjacent
tanX = 9.8/12.5
X = arctan (9.8/12.5)
X = 38 degrees
if you use something other than 9.8 for gravity you'll want to do the calculation yourself with that value
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