Originally Posted by
oggers
This result has already been mentioned and proved in other ways in this thread multiple times now.
And just for entertainment purposes, I'll throw in another proof. This is about as close as you can come to the basketball full of air vs basketball full of concrete. The video contains a lot if irrelevant and annoying dialog and several somewhat irrelevant demonstrations. However there is a segment which is exactly on point, in which they simultaneously drop a football/soccer ball (depending on geographic preferences) and a similarly sized cannon ball. I've attempted to link it such that it starts on the relevan portion. In case that doesn't work, watch from about 2:30. ANCPERS, TINSTAAFL, et al have been insisting they would fall with identical velocities. Anyone care to guess what *actually* happens?
Comparison of falling spheres.