1. The problem statement, all variables and given/known data Parachutists open the canopy of their parachutes in order to reduce the speed at which they land on Earth. How large should a parachute canopy be in order to reduce the landing speed to 10 miles per hour? Consider the parachute to be circular, to be descending vertically without gliding, and to have a coefficient of aerodynamic drag of 1.45 2. Relevant equations problem is all equations i find include mass as a variable. 3. The attempt at a solution none.