[問題] 角動量的問題

看板Physics作者 (= =)時間14年前 (2011/07/27 00:05), 編輯推噓4(4推 0噓 5→)
留言9則, 4人參與, 最新討論串4/5 (看更多)
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！ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.46.125.235
推
07/27 00:08, , 1F
角動量的定義@@
07/27 00:08, 1F
推
07/27 00:08, , 2F
L = r cross p
07/27 00:08, 2F
→
07/27 00:08, , 3F
v = dr/dt
07/27 00:08, 3F
→
07/27 00:09, , 4F
p = mv
07/27 00:09, 4F
→
07/27 00:09, , 5F
r = x i + y j
07/27 00:09, 5F
→
07/27 00:09, , 6F
what do you need?
07/27 00:09, 6F
推
07/27 00:11, , 7F
推 n 大
07/27 00:11, 7F
→
07/27 00:11, , 8F
我試試看，感謝樓上！
07/27 00:11, 8F
推
07/27 01:47, , 9F
原PO在念BENSON?
07/27 01:47, 9F
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文章代碼(AID): #1EBkN2rh (Physics)