Reply to Views:tvb now,tvbnow,bttvb" o0 o7 t. e5 a
Yes 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 ! M# I4 |% I# A/ W+ S$ t6 l# \
' G! a y( h6 n) y6 A3 r
so answer is :3 t- D. U- D) ~8 n
tvboxnow.com9 U2 p0 J* |) y3 B; Z
d = t * v1 * v2 / (v1-v2)作者: views 時間: 2010-3-9 01:04 PM
