Doesn't explain why the paper plane glides, though. I was always frustrated in physics class. There just wasn't enough precision to describe reality and everytime a test said "ignore friction" I would mentally shout out "but there is friggin' friction". Math made a lot more sense and it was only with advanced math knowledge that I would finally be able to make sense of some of the entry physics stuff.

If only they had told me everything (including friction), then maybe phyics would have made a lot more sense to me. But then again, school math never even mentioned imaginary numbers. School is very incomplete.