Reply to Views: $ e" w4 y/ }- w& p4 @# K8 PYes 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 , h8 s; i# g8 R$ T$ m% [www3.tvboxnow.com0 X+ C. O( Y! S6 s' \+ Q
so answer is : + D( z& @ z# w1 ~8 Twww3.tvboxnow.com , G, X z7 ^& m2 t. M! D* G' d# f$ ^tvb now,tvbnow,bttvbd = t * v1 * v2 / (v1-v2)作者: views 時間: 2010-3-9 01:04 PM
