問題詳情
41. The force
in the figure will keep the block and the pulleys inequilibrium. The block has mass m. Neglect the mass of pulleys andstrings and friction in the system. What is the strength of
?
(A)mg
(B)mg/3
(C)mg/5
(D)mg/7
(E) mg/9
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增