ned jackson lovely forkquto mon sep 09 2002 110122am 0700 john hall wrote fast normal terminal velocity much slower terminal velocity calculated v_t sqrtfrac2mgcpa c experimentally determined coefficient p density air area object calculations work object blunt airflow turbulent blah blah blah terminal velocity skydiver actually varies diver holds go faster pull cannonball part else equal terminal velocity inversely proportional square root air density air density drops pretty quickly really something digging math think involves calculus integrate amount mass column atmosphere trails grabbed stuff directly book 87 guy named gregory robertson noticed fellow parachutist debbie williams knocked unconscious shifted head hit 200 mih caught pulled chute 10 seconds spare njl mon 9 sep 2002 204617 0400 big jump