本题目来源于试卷: Physics Unit8: Rotational Motion，类别为 国际高中通用物理
[单选题]
Two equal forces are applied to a door. The firjd*9 :dal1no wgz +hx7st force is applied at t - g/opdi 5niac(9t/jm9a:rgg he midpoint of the door; the second force is applied at the doorknob. Both forces are applied perpendicular ti5aoggt(gjmrdc:n ip -/9 a9/ o the door. Which force exerts the greater torque?
A. the first at the midpoint
B. the second at the doorknob
C. both exert equal non-zero torques
D. both exert zero torques
参考答案: B
本题详细解析:
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