This problem but air resistance is not neligible it is affec

This problem but air resistance is not neligible, it is affected by the forces of gravity and Newton\'s Law (quadratic) drag expressed by..

Solution

start ball one at max height:
hf=maxheight-1/2 g t^2
ball two:
hf=vo*t-4.9t^2

but t is the same, and hf is the same:

set the two equations equal, and solve for t.
then having t, find hf.