... nguyờn t hiủrụ: 13 = 12 + 23 v f13 = f12 +f23 (nh c ng vộct) n=6 n=5 n=4 n=3 n=2 n=1 http://ebook.here.vn T i thi, eBook, Ti li u h c t p Mi n phớ 30 http://ebook.here.vn T i thi, eBook, Ti li ... l1 + l2 cú chu k T2,con l c ủn chi u di l1 - l2 (l1>l2) cú chu k T4 Thỡ ta cú: T32 = T12 + T22 v T42 = T12 T22 V n t c v l c cng c a s i dõy l c ủn v2 = 2gl(cos cos0) v TC = mg(3cos 2cos0) ... cũn l i l x2 = A2sin(t + 2) Trong ủú: A22 = A2 + A12 AA1cos( ) A sin A1 sin tg2 = v i ( n u ) Acos A1cos1 http://ebook.here.vn T i thi, eBook, Ti li u h c t p Mi n phớ N u m t v t tham...