The magnitude of a moment is the product of the force and（）.
举一反三
- To describe a force, we only need to describe the magnitude that describe "how hard" the force pushes or pulls.
- When calculating the displacement of composite structure: A: Only bending moment is considered B: Only axial force is considered C: Bending moment and shear force are considered D: Bending moment and axial force are considered
- The magnitude of the internal force of a bar depends on not only the external force but also the shape of its cross section. A: 正确 B: 错误
- After simplification of any force system in space, a force and a couple are obtained. The magnitude of this force is ( ) the principal vector of the force system. A: equal to B: more than C: less than D: not equal to
- The internal forces in a thin plate under bending deformation include: A: bending moment B: twisting moment C: shear force D: axial force