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CrossFit415

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## Homework Statement

Question: A hot-air balloon is ascending at the rate of 12m/s and is 80m above the ground when a package is dropped over the side.

a.)How long does the package take to reach the ground? b.)With what speed does it hit the ground?

## Homework Equations

I know -- acceleration = -9.8 Initial velocity = 12 m/s and initial height = 80 m.

I know I have to use this formula

Xf = Vo + 1/2 (g) (T)

^{2}

Vo = 12 m/s

Xf = 80 m

g = -9.8 m/s

^{2}

I set Xf to 0.

How would I find Time?

Thanks