1. The problem statement, all variables and given/known data I am unable to calculate air drag for a projectiles lab I am doing. It involves shooting elastic bands and measuring the distance they travel and compare it to the theoretical distance(with and without friction). It takes 0.45 seconds for the elastic band to fall and its initial velocity is dependent upon the stretch. I also have measured the mass(0.37grams) and the k value (31 N/m). 2. Relevant equations the equation 1/2 ACdrag p v^2 is only valid for teh initial drag force, but since the projectile loses velocity as time increases, how would i calculate the average drag force. (I also do not know the final velocity) 3. The attempt at a solution I have thought about integrating the graph Fdrag v.s V, however, I do not have the final velocity.