How to solve this physics problem?

Please help!

所有跟帖： 

• 总觉得题目很怪 -ghztomy- ♂ (88 bytes) () 03/28/2009 postreply 20:08:11

• 这里的滑轮是光滑的，没有阻力？ -于德利- ♂ (0 bytes) () 03/29/2009 postreply 05:43:37

• 没有阻力 -ghztomy- ♂ (188 bytes) () 03/29/2009 postreply 08:29:21

• Must have the following condition: -fargo_me- ♂ (45 bytes) () 03/29/2009 postreply 12:03:40

• answer is:T=T=(2/5Wp+Wb/2)/(1+cos45) -ghztomy- ♂ (111 bytes) () 03/29/2009 postreply 19:56:51

• 错了，应该为 T=(2/5Wp+Wb/2)/(2/5+cos45) -ghztomy- ♂ (0 bytes) () 03/29/2009 postreply 20:01:33

• 回复：How to solve this physics problem? -softstorm- ♂ (56 bytes) () 04/01/2009 postreply 12:11:49

• 回复：回复：How to solve this physics problem? -清华狂徒- ♂ (11 bytes) () 04/02/2009 postreply 07:25:57

• No, you are wrong -clinton-2007- ♂ (243 bytes) () 04/02/2009 postreply 08:22:55

• T=(2/5Wp+Wb/2)/(2/5+cos45) -clinton-2007- ♂ (0 bytes) () 04/02/2009 postreply 08:24:47