That is a description of natural phenomena. Regardless how



所有跟贴·加跟贴·新语丝读书论坛http://www.xys.org/cgi-bin/mainpage.pl

送交者: steven 于 2005-1-15, 02:46:35:

回答: F is defined as dp/dt. Nothing to do with the real world. 由 008 于 2005-1-14, 16:41:08:

you choose to describe it, the natural phenomena remains the same such that a heavier object fells the same way as a lighter object if air resistence is not present. That is the nature, and that cannot change that.



所有跟贴:


加跟贴

笔名: 密码(可选项): 注册笔名请按这里

标题:

内容(可选项):

URL(可选项):
URL标题(可选项):
图像(可选项):


所有跟贴·加跟贴·新语丝读书论坛http://www.xys.org/cgi-bin/mainpage.pl