Recently I read an article in the newspaper (yes, someone still reads them) of someone who committed suicide by jumping out a window of a 7 story building. That got me to wondering how much "force" he experienced at the moment of impact. (I don't know if force is the metric I'm looking for, hence the quotation marks.) Assuming he weighed 100 kg, how much force would he have experienced when he hit the ground? Let's say 7 stories is 70 feet, or 21.336 meters. I know that F = ma, but that just results in 980 N of force. I understand that there are numerous other factors, so let's say he hit his head and that the top had an area of 0.5 ft^2 (0.04645 m^2). Also assume that the impact was near instantaneous, so perhaps the duration of impact was 1 microsecond. I know that there's the issue of linear and rotational motion, but I want to ignore that. I don't know what other factors would have influenced the "force." Kinetic energy? Momentum? I know it's a weird question, but I've been thinking for it all day and don't know how to approach it.