Hello all, I have a gravitational problem that I need help with figuring out. Its not actual homework but work related. I have a mass of 400 lb (large person) that needs to impact the ground at 3.5g. How do I calculate how high the mass needs to be dropped from to achieve the 3.5g? Its been a long time since physics classes and I need a refresher! Let me know if I missed any pertinent info. Thanks in advance!