Russian was correct in his calculation of force. I was wrong and hence deleted my post. No excuses. That was what he was asked and that's what he calculated.
IMO more useful quantities in this instance would be momentum (~279 Newtons) or kinetic energy (1703 Joules or ~1.7 KJ.) Given a height of 25 ft, terminal velocity of 40.12 f/s or 12.285 m/s.
Last edited by Jim Jeffries; 07-18-2012 at 12:15 AM..