specify two difference between internal and external force
Answers
Explanation:
Internal forces are the forces that emanate from within a system.
The system must be defined by you/problem.
External forces are the forces that emanate from outside the system. ... Action or reaction force has no difference.
Explanation:
External forces are those which are applied to the element such as beam or column. The dead weight of the construction is either the external force since in the calculation scheme it’s represented as a force applied to the given construction.
The internal forces are forces which occur in construction due to the external forces applied to it. To find external forces in the element the method of sections is usually used. Therefore to find external forces in the given point of the element one will need to make a section in the given place and substitute one of the halves of the element with forces which would hold the element in equilibrium, i.e. the sum of all the forces from both sides of the section of the element must be equal to zero.
Since all the building constructions are stationary they always have ties, e.g. the ties for the beam are it’s supports, the tie for the column is a ground. All the ties can and should be substituted with forces in the calculation scheme. Those forces which occur in ties are called reactive while all the other forces, i.e. those which are applied to the calculated element are active forces.