Mechanical Advantage (id: 4fbda5839)

本题目来源于试卷: Mechanical Advantage，类别为 美国物理杯赛(Physics Bowl)

[单选题]
99.10: A simple machine can NOmulgz6 :32r. i ked92bcj dd*wT do whicq3gqtpkn8/ k9t7jvi :9bw b:cqh+s4f h of the following:

A. have a mechanical advantage greater than 1.
B. change the direction of the force.
C. move the resistance a greater distance than the applied force.
D. increase the energy put into it.
E. produce a force on the resistance which is greater than the applied force.


参考答案:  D


本题详细解析: 暂无

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