作者bpbpbp (= =)
看板Physics
標題[問題] 角動量的問題
時間Wed Jul 27 00:05:18 2011
A particle of mass M moves in the xy plane. Its coordinates as a function of
time are given by x(t)=At^3; y(t)=Bt^2-Ct, where A,B,C are constants.
Find its angular momentum about the origin.
答案是 (2C-Bt)MAt^3
我想不太通，請版上高手解答。感恩！
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◆ From: 114.46.125.235
推 ntust661:角動量的定義@@ 07/27 00:08
推 nightkid:L = r cross p 07/27 00:08
→ nightkid:v = dr/dt 07/27 00:08
→ nightkid:p = mv 07/27 00:09
→ nightkid:r = x i + y j 07/27 00:09
→ nightkid:what do you need? 07/27 00:09
推 ntust661:推 n 大 07/27 00:11
→ bpbpbp:我試試看，感謝樓上！ 07/27 00:11
推 qaz123454321:原PO在念BENSON? 07/27 01:47