1. The problem statement, all variables and given/known data How could u find the drag/friction due to air on a A4 size page dropped perpendicular to the ground. There are about 20 sheets and is dropped about waist height. The tricky thing is no instruments are aloud. Only your senses... 2. Relevant equations F=-cv where c is the constant due to air friction. v is the vel and F the force of air 3. The attempt at a solution have no clue because i would think u would at least need a stop watch.