Galileo's experiment from the leaning tower?

Question

The experiment which Galileo is believed to be done from the leaning tower of Pisa Through which he proved that heavy and light object falls on the ground @ the same time if air resistance is not taken into consideration. how did he do that cuz from wat I've learned we can prove that heavy n lite object when released from a certain height touches the ground at the same time only if done in vacuum and not where air is there. so how did Galileo prove his theory from leaning tower of Pisa where obviously air is present?

Answer 1

Galileo used 2 equally shaped size balls. One is a cannon ball, the other is a wooden ball. For this case, the air resistance exerted onto both balls are the same and thus nullified the effect due to air resistance when making the comparison.

Answer 2

By using very dense and massive objects.  For example, if you drop a 1000 lb lead sphere and a 200 lb one both will fall at almost exactly the same speed.  Neither will be moving very fast, so the effects of air resistance will be minimal compared to acceleration due to gravity.  Such large, dense objects will have very little air resistance compared to their weight.  Any differences in the time the objects hit the ground can be written off to not dropping them simultaneously.

Answer 3

Actually, the experiment wasn't ever performed: it is in the nature of a gedankenexperiment (German for thought experiment).  Suppose that a one-pound and a ten-pound cannonball are dropped off the tower, and suppose that one of them hits first.  Now tie them together with a string, and try the experiment again.  What happens?  Does the combination fall at 1-pound speed, 10-pound speed, or 11-pound speed?  The only sensible answer to this is that they all have to fall at the same speed.