发力做功一样，初速度也一样，能量转换 FS=W=MV^2/2=MgH

来源: ying312 于 2012-12-17 09:41:26 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.