Reply to DrewD
There seems to have been a [Math Processing Error] in your reply which looks to be important.
To clear things up. In the equation all variables are considered to be constant except "F" and "t." Initial velocity of "m" is to be considered 0. "r" is to be considered the initial...
It has occurred to me that gravitational force on an object will change as the object falls toward the Earth. I modified Newton's equation F=GMm/(r^2) to reflect the change in force over time:
F = GMm/[r-.5a(t^2)]^2
Now that I have the equation I'm trying to figure out the instantaneous change...