推 suny999:rBA = (A-B) = [-2, 7, -3] 05/31 14:12
→ suny999:eBC=(C-B)/(sum((C-B)**2))**0.5=[-0.7683,-0.3293,-0.548 05/31 14:15
→ suny999:eDA=(A-D)/(sum((A-D)**2))**0.5=[.19611 .78446 -.58834] 05/31 14:16
→ suny999:P =20*eDA=[ 3.9223227 , 15.68929081, -11.76696811] 05/31 14:17
→ suny999:mBC = dot(cross(rBA,P),eBC) = 71.037590070086907 kN-m 05/31 14:18
推 suny999:其中 rBA 也可以換成 rBD rCA rCD 答案一樣 05/31 14:27
→ tsanning:感謝 05/31 15:38
→ tsanning:原來-2,7,-3是醬出來的阿~ 05/31 15:44