本题目来源于试卷: Newton’s law of motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
14.14: A box rests on the wh6c ,5xrnl-it27cc1 od ,brg57sbnv floor of an elevator. The elevator is accelerating upward. Which one of the following choices best represents the Newton’s Third Law pair forg 72tscnc r,b7bv51o dce to the gravitational force acting on the box by the Earth?
A. There is no Newton’s Third Law pair force in this scenario.
B. The entire normal force of contact from the floor on the box.
C. Only a portion of the normal force of contact from the floor on the box.
D. The force of the cables pulling upward on the elevator.
E. The gravitational force acting on the Earth by the box.
参考答案: E
本题详细解析:
暂无
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