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**1. Homework Statement**

At .5 of its maximum height, the speed of a projectile is .75 of its initial speed. What was its launch angle?

**2. Homework Equations**

(1)V1y = V0y - gt

(2)y1-y0 = V0yt - .5gt^2

**3. The Attempt at a Solution**

The part that really bothers me is the second part of the first statement: "the speed of a projectile ..." What is the speed of a projectile? What do i denote that as? V?...

So far I've gotten the following:

initial velocity y-component:

knowing: V1y = 0 (at max height)

V1y = V0y - gt

Voy = gt

substitute V0y into equation (2) gives max height:

y=.5gt^2

Any assistance would be most appreciated.

Thanks!

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