本题目来源于试卷: Physics Unit4: Force Dynamics & Newton's Laws，类别为 通用国际物理
[单选题]
A child's toy is suspenf dj*zb*g.(ku ded 2;uxwb2gd;f3h b( lyefrom the ceiling by means of a string. The Earth pulls downward on the toy with its weight force of 8.0 N. If this(dufw hb; l2;b2 ey3gx is the "action force," what is the "reaction force"?
A. The string pulling upward on the toy with an 8.0-N force.
B. The ceiling pulling upward on the string with an 8.0-N force.
C. The string pulling downward on the ceiling with an 8.0-N force.
D. The toy pulling upward on the Earth with an 8.0-N force.
参考答案: D
本题详细解析:
暂无
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