>>19872119Pic related is a dog in a pool, the pool has a treadmill at the bottom. The water makes the dog more buoyant so they can workout and rehab after a bad injury. If you were standing on that treadmill while wearing roller skates and the pool was full up to your neck, could you SWIM forward with your arms or would the moving treadmill keep you from swimming forward?
That's a very similar question. Of course you could swim forward through the water using your arms, the treadmill wouldn't keep you in the same spot in the pool. In the same way a plane "swims" forward through the atmosphere. By "paddling" air in the case of a prop on an prop driver airplane or by pushing air out of the back like a jetboat in the case of a jet airplane.
