# How does Zero-G work?

I understand that the airplane accelerates at the acceleration due to gravity in the downward direction, making the acceleration of the person relative to the airplane zero. But the acceleration due to gravity isn't constant, so I was wondering if someone could show me how you could calculate the acceleration needed for an airplane at certain altitudes?

Oh, wait. I'm so dumb....

acceleration due to gravity = Gm/r^2

From that formula, you could calculate the acceleration needed at different altitudes. I still don't understand how would I find the equation to model the airplane's position using sine waves. Any ideas?

D H
Staff Emeritus