Question

Define equilibrium and State two conditions of equilibrium?

Answer 1

Answer:

Equilibrium, in physics, the condition of a system when neither its state of motion nor its internal energy state tends to change with time.

conditions:

• The sum of all external forces acting on the body is zero (first condition of equilibrium), and

• The sum of all external torques from external forces is zero (second condition of equilibrium).

These two conditions must be simultaneously satisfied in equilibrium.

If one of them is not satisfied, the body is not in equilibrium.

Answer 2

Conditions for equilibrium require that the sum of all external forces acting on the body is zero (first condition of equilibrium), and the sum of all external torques from external forces is zero (second condition of equilibrium). These two conditions must be simultaneously satisfied in equilibrium.

The equilibrium condition of an object exists when Newton's first law is valid. An object is in equilibrium in a reference coordinate system when all external forces (including moments) acting on it are balanced. This means that the net result of all the external forces and moments acting on this object is zero.

• A solid body submitted to three forces whose lines of action are not parallel is in equilibrium if the three following conditions apply :
• The lines of action are coplanar (in the same plane)
• The lines of action are convergent (they cross at the same point)
• The vector sum of these forces is equal to the zero vector.