Reply to Views: ( n3 }! w7 c, k$ {8 FYes this is simple calculation, but you have made the first step only. You may get only half point while the question is asking about the distance, which you have simplified your first step t2 - t1 = d/v2 - d/v1 into d=???.作者: lalalaudh 時間: 2010-3-9 12:35 PM
t = t2 - t1 = d/v2 - d/v1 5 i, D2 {) E" v$ H$ h, c5.39.217.77tvb now,tvbnow,bttvb' P0 e% f7 r, g
so answer is :公仔箱論壇! F% Z) @% N1 ]; \
4 H N t; L( {; x4 C/ ctvb now,tvbnow,bttvbd = t * v1 * v2 / (v1-v2)作者: views 時間: 2010-3-9 01:04 PM
