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 applieuw s9 8cdl*jkld 35sb:d to a door. The first force is r4v 4z8/7o -z o.hluvt,by99d yntio-7q keqfapplied at the midpoint of the door; the second force is applied at the doorknob. Both forces are applied perpendicular to the door. Which fo ,99zve/hdt -nv4q-zb4quo y.7rly t 8 7fooikrce 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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