一辆自行车骑了100里, 问轮胎上一点移动多少距离?
注意不是位移
轮子上一点移动多少距离?
所有跟帖:
• 要用微积分的吧。 -Commentate- ♂ (191 bytes) () 05/26/2010 postreply 13:14:25
• Near 100 li. -jinjing- ♀ (99 bytes) () 05/26/2010 postreply 14:23:41
• It May be near 200 li. (r/R)*100+100 -jinjing- ♀ (0 bytes) () 05/26/2010 postreply 14:39:15
• I,m wrong,007 win -jinjing- ♀ (0 bytes) () 05/26/2010 postreply 15:15:42
• near (400/Pi)*li, You are right. -jinjing- ♀ (126 bytes) () 05/26/2010 postreply 15:14:20
• Agree with your answer -AnaZhang- ♀ (148 bytes) () 05/26/2010 postreply 18:36:36
• Thanks, I did not know that word before -guest007- ♀ (54 bytes) () 06/02/2010 postreply 09:14:07
• 少于100里,因为自行车 -风再起时2008- ♂ (0 bytes) () 06/06/2010 postreply 09:25:46
• 因为自行车要刹车 ;) -风再起时2008- ♂ (0 bytes) () 06/06/2010 postreply 09:26:25