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
71.
A small object of mass m is suspended from a fixed point O by a light, inextensible cord. The object is raised until the cord is horizontal and then released. It moves in an arc of a circle as shown in the figure above. When it passes through its lowest position at point P, the tension in the cord is__________ .
(A) 3mg.
(B) 2mg.
(C) 1mg.
(D) 0mg.