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 areu 4xzn 95yy9a uti(e6p app0o(l+/ xwcni wzo1np)tpax26lied to a door. The first force is applied at the midpoint of the door; the second force is applied atn/2()n1p 6wax izxwto po l0c+ 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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