i did not say 机械能守恒 either - if so, sand grain would be bouncing

i did not say 机械能守恒 either - if so, sand grain would be bouncing

所有跟贴·加跟贴·新语丝读书论坛

送交者: meiyou 于 2009-11-04, 13:01:14:

回答: 一回事，不过机械能是不守恒的，尘埃落定时转化成热能了，得重来。由 chouqilozi 于 2009-11-04, 12:58:57:

把这个问题转化成一根绳子下落，交给绳力学专家解决。 (无内容) - chouqilozi (0 bytes) 2009-11-04, 13:55:08 (380608)
- hehe (无内容) - meiyou (0 bytes) 2009-11-04, 14:04:08 (380609)