Before digging out the vacuum cleaner and a piece of Styrofoam
and carving out a hunk. Or rotating a 4 inch diameter sawtooth disk on a
digital scale....
P2 (Air)
Px ? __/|___/|___/|___/|___/|___/|___/|__/| -------> Direction of Motion
|_____________________________|
P1 (Air)
Upward Force???
More coffee please.
Fred
