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 a6*xr)a j0jrlwacv54dgdakhv) hgd);2nq 6llg p;5c2 kainst a crate on a table. Neither is moving. Which of the following statements concerning this situation is CORRE )hvl6;25)nk2 ca g kq;glddphCT?

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

微信扫一扫，分享更方便