試卷名稱:109年 - 109 臺北市市立國民中學正式教師聯合甄選:理化(雙語)科 #85963
年份:109年
科目:教甄◆理化專業
89. A 20.0 kg uniform plank is supported by the floor at one end and by a vertical rope at the other as shown in the figure below. A 50.0 kg mass person stands on the plank a distance three-fourths of the length plank from the end on the floor. What is the tension in the rope? 
(A) 165.5N
(B) 265.5N
(C) 365.5N
(D) 465.5N