1. The problem statement, all variables and given/known data I am just wondering because i saw this show (cartoonish) where this guy jumped from an apartment of 7 floors (I say it's about 30m tall?) into the water (for some reason the apartment is build over the ocean). Here is a picture. I wanted to use spoiler because it is kinda big but doesn't work. [PLAIN]http://img6.imageshack.us/img6/7531/unledvo.jpg [Broken] 3. The attempt at a solution The person who jumped was a high school student guy, so I say he weighs about 65kg?? I don't know what is the force necessary to disable his body and break his bones.