1. The problem statement, all variables and given/known data I just had an exam in physics and there was this one easy question that I just couldn't wrap my head around. A skydiver (85kg) is accelerating at 3m/s^2. What is the force of the air resistance on him? 2. Relevant equations f=ma and other mechanics 3. The attempt at a solution I solved for the F of the skydiver which would equal 255 N. I then used Newton's third law to conclude that the air resistance must be 255 N up. But then I started thinking... If he's accelerating, there must be a Fnet... How, then, can he accelerate if the friction from the air equals the force of gravity? What should I have done?