Newton’s law of motion (id: 83486e771)

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]
06.14: A book leans against ngp x7 g3uu (w68nh)al9 gb 2zt(9q-cghpuad9 /r fip,vw tq6+lm7l4t a crate on a table. Neither is moving. Which of the followingtti lpm+64l/ qf,wvr7 statements concerning this situation is CORRECT?

A. The force of the book on the crate is less than that of crate on the book.
B. Although there is no friction acting on the crate, there must be friction acting on the book or else it will fall.
C. The net force acting on the book is zero.
D. The direction of the frictional force acting on the book is in the same direction as the frictional force acting on the crate.
E. The Newton’s Third Law reaction force to the weight of the book is the normal force from the table.


参考答案:  C


本题详细解析: 暂无

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