Calculate drag coefficient of freefaller (prior to chute opening)> (constant) force down (in newtons) due to gravity = mass * acceleration due to gravity, say 80 * 10 = 800 newtons.>The up...
= the (square of the velocity (m/s) * drag coefficient ) newtons if terminal velocity is known (forces balanced , no further acceleration), drag coefficient can be found. say terminal velocity(tv) =...