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## Homework Statement

At 0.5 of its maximum height, the speed of a projectile is 0.75 of its initial speed. What was its launch angle?

## Homework Equations

Not sure here, but:

v^2 - vo^2 = 2as [maximum height]

Ay = Asin(theta) [y-component]

## The Attempt at a Solution

I didn't get very far, but:

vo = vo

v = 0.75 vo

0.75vo^2 - vo^2 = (2)(-9.8)s

-0.25vo^2 = -19.6s

vo^2 = 784s

I'm stuck from here on, should I try to find the y-component for this?

[Also I'm an almost total beginner at Physics, excuse me if I'm totally wrong].

Any help would be greatly appreciated. Thanks everyone!