英語時差：斜坡物理學(xué)（上）

Last time we discussed a classic physics question. Drop two objects of different mass, say a bowling ball and a golf ball, from a high building. Which Hits The Ground First? The answer?They hit at the same time. The more massive object has more “stuff” for gravity to act on, but because it’s more massive, it also takes more to get it to move. The less massive object has less “stuff” for gravity to act on, but is easier to move. The end result is they fall at the same rate. This Seems Hard To Believe… Heavier things just seem like they should fall faster. That may be partly due to the fact that we can’t test it easily — you don’t really want to drop heavy things off of buildings just out of curiosity.