送交者: pgss 于 2015-05-02, 21:44:45:

回答: 你爬上去做的功等于角动量的增加，能量守恒。 由 cornbug 于 2015-05-02, 20:44:26:

• 爬is external force, system is not conserved. Hence - cornbug (54 bytes) 2015-05-02, 22:17:24 (778561)
  • energy will not conserve either as u said (无内容) - pgss (0 bytes) 2015-05-02, 23:02:54 (778564)
  • 让conner答 (无内容) - pgss (0 bytes) 2015-05-02, 23:02:09 (778562)

加跟贴