問題詳情
20.如【圖 20】所示之結構及受力，請問在 J 點處之截面彎矩為何？(sin30° =cos60° =0.5, sin60° =cos30° =0.866)
(A) 10.8 N●m
(B) 18.7 N ● m
(C)21.6 N ● m
(D) 43.2 N ● m
20.如【圖 20】所示之結構及受力，請問在 J 點處之截面彎矩為何？(sin30° =cos60° =0.5, sin60° =cos30° =0.866)
(A) 10.8 N●m
(B) 18.7 N ● m
(C)21.6 N ● m
(D) 43.2 N ● m