本题目来源于试卷: Physics Unit8: Rotational Motion，类别为 通用国际物理
[单选题]
Two equal forces are applied to a door.hxc y510 qzc4q The fi;ldtzrdl 3 ,7/bzu1 eagp -tgx3ir,8 krst force is applied at the midpoibrxla-,3u ,zel r pd;dt z3/8g gi7kt1nt of the door; the second force is applied at the doorknob. Both forces are applied perpendicular to 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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