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
A: 正确
B: 错误
举一反三
- When member is subjected to the eccentric loads, the wrong description of neutral axis is ( ). A: The position of the neutral axis is independent of external forces and eccentricity B: The neutral axis and the point of the external force are on opposite sides of the cross section centroid respectively C: The neutral axis is related to the shape and size of the section D: The closer the external force point is to the centroid, the farther the neutral axis is from the centroid
- The internal force of any structure is zero if it is not subjected to external loads. A: 正确 B: 错误
- To describe a force, we only need to describe the magnitude that describe "how hard" the force pushes or pulls.
- The internal force of any structure is zero if it is not subjected to external loads.
- If a circular shaft is under torsion, then there should be only shear stresses and no normal stresses on its cross section. A: 正确 B: 错误