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?
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/s2
I set Xf to 0.
How would I find Time?