Posted by gemmma on .
A hotair balloon is ascending at the rate of 11 m/s and is 51 m 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?

physics 
bobpursley,
Consider the package:
hf=hi+vi*t1/2 g t^2
vi^2=2*11*51 so put that vi in the above equation. Hf=0, hi=51, solve for t.
Vf=vi9.8*t