問題詳情

49. A block (m1) with a weight of 10 kg was placed on awooden bar with a weight of 2 kg. The left end of thebar was attached firmly to a triangle. How much force(F) does it take to keep the system in horizontalequilibrium? (Gravitational acceleration g = 10 m/s2)
  


(A) 165 N
(B) 224 N
(C) 283 N
(D) 318 N
(E) 361 N

參考答案

答案：C
難度：計算中-1
書單：沒有書單，新增

用户評論

【面試倒楣鬼-22幸運上後西】評論

力矩平衡,  F*0.3 = 0.5*2☆(...