問題詳情

11. A uniform sign is supported against a wall at point P as shown in the figure. If thesign is a square 0.4 m on a side and its mass is 4.0 kg, what is the magnitude of thehorizontal force that the wall at P experiences?


(A) 5.8 N
(B) 10.0 N
(C) 20 N
(D) 98 N
(E) 75 N.

參考答案

答案：C
難度：計算中-1
書單：沒有書單，新增