2022知到答案 理论力学（长安大学） 最新完整智慧树知到满分章节测试答案

绪论 单元测试

1、 问题:After the 20th century, physics divided into two branches: modern physics and modern mechanics.（ ）
选项：
A:对
B:错
答案: 【
对
】

2、 问题:Who is known as the “father of mechanics”（ ）.
选项：
A:Aristotle
B:Archimedes
C:Steven
D:Newton
答案: 【
Archimedes
】

第一章 单元测试

1、 问题:
There is a coplanar concurrent force systemacting on a rigid body, and the force vector relationship of the forces is shown in Figure，It can be known that the resultant force of the force system is zero and the force system is in equilibrium.（ ）
选项：
A:对
B:错
答案: 【
错
】

2、 问题:
As is shown in the figure, the force P on AC can be moved to BC according to the transmissibility of the force.（ ）
选项：
A:对
B:错
答案: 【
错
】

3、 问题:A rigid body, subjected to forces which are acted on two points, is called Double-force Body. （ ）
选项：
A:对
B:错
答案: 【
错
】

4、 问题: and means the same. （ ）
选项：
A:对
B:错
答案: 【
错
】

5、 问题:
The FBD shown in the figure is correct. （ ）
选项：
A:对
B:错
答案: 【
错
】

第二章 单元测试

1、 问题:
There is a coplanar concurrent force system acting on a rigid body, and the force vector relationship of the forces is shown in Figure，It can be known that the reduction of the force system is（ ）.
选项：
A:a couple
B:a force
C:a force and a couple
D:in equilibrium
答案: 【
in equilibrium
】

2、 问题:
As is shown in the figure, if the couple M acting on AC is moved to BC, the magnitude of the reaction forces at A, B and C（ ）.
选项：
A:All unchanged
B:unchanged at A and B, changed at C
C:All changed
D:changed at A and B, unchanged at C
答案: 【
All unchanged
】

3、 问题:The magnitude and direction of the force can be determined by the analytical expression of the force .（ ）
选项：
A:对
B:错
答案: 【
对
】

4、 问题:
The weight of the rod AB and CD and the friction is ignored, if the moment of the couple acting on the rod AB is , in order to keep the system balanced, the moment of the couple acting on the rod CD is is shown in the figure, and its moment value is（ ）.
选项：
A:
B:
C:
D:
答案: 【

】

5、 问题:
As is shown in the figure, the couple M acts on the AC rod, the magnitude of the reaction force of support A is（ ）.
选项：
A:4 kN
B:5 kN
C:8 kN
D:10 kN
答案: 【
10 kN
】

第三章 单元测试

1、 问题:Taking any two points A and B in the action plane of the conplanar force system, if the principal moments of the force system about these two points are both zero, the force system cannot be composed into a force. （ ）
选项：
A:对
B:错
答案: 【
错
】