Question

Internal and external forces definition and examples

Answer 1

An internal force, on the other hand, is a force inside the rigid body resulting from external forces. ... Examples of internal forces include, but are not limited to, internal normal forces in a stress member, internal normal and shear forces in beams and slabs, and internal forces in springs.

Answer 2

❁ΔŇŞŴ€Ř❁

◆ Internal forces of the earth:

⇛Act from within the earth towards the surface, for example, volcanic eruptions and earthquakes.

◆ External forces of the earth:

⇛Act on the surface of the earth, for example, running water, moving ice, wind, water and waves. They are collectively called the agents of gradation.