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 suspended -4*o*c nf98z hn0v tvkiqws/hfrom t h:d xzh;(r;lo js*wx(he ceiling by means of a string. The Earth pulls downward on :s;xj(zo(;* drh wx hlthe toy with its weight force of 8.0 N. If this 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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