
Originally Posted by
Halgy
I know that it doesn't make sense (logically), but there's no way that Hermione's bag weighed as much as it should. She had a large pile of books (Harry obvserved that her 'keep' pile was bigger than her 'discard' pile, and you know how many books Hermione had), plus a tent, potions, clothes, and a picture frame, not to mention other stuff.
That bag would have weighed several hundred pounds, but there was no mention of it ever being heavy from an outsiders (the carrier's) perspective. Yes, it thudded when she dropped it, but that's because the inside of the bag was susceptible to the laws of physics (weight), but the bag as a whole was not.