- #1
xcgirl
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Homework Statement
A quarterback can throw 60yd @ 45 degree angle. How fast can he throw?
Homework Equations
60 yds = 54.86 meters
The Attempt at a Solution
x-direction
d = vt
4.86 = vcos(45)(t)
y-direction
d = vt + 1/2at^2
d = vsin(45)t + 1/2(9.8)t^2
I want to solve for t in both equations, set them equal, and use that to solve for v but I don't know what to use for d in the y-direction equation. would it be zero because it ends up on the ground?