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white_is
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Homework Statement
A cannonball is fired with initial speed v0 at an angle 30° above the horizontal from a height of 38.4 m above the ground. The projectile strikes the ground with a speed of 1.3v0. Find v0. (Ignore any effects due to air resistance.)
Homework Equations
v= Vo + at
v^2 = Vo^2 + 2a(x-Xo)
x = Xo + Vot + .5at^2
The Attempt at a Solution
I honestly don't know where to start with this problem. I know it needs to be separated into X and Y components, but it just seems like I don't have enough information to do it.
I mean, what do I know?
x = ?
Xo = 0
Vx = ?
Vox = ? Vcos30 = 1.3Vocos30
Vx = ?
a = 0
t = ?
y = -38.4
Yo = 0
Vy = ?
Voy = ? Vsin30 = 1.3Vosin30
Vy = ?
a = -9.8
t = ?
Can anyone help give me an idea of where to start?