Question

when is a body is in a static equilibrium?

Answer 1

If the combined effect of all the forces acting on a body is zero and the bodyis in the state of rest then itsequilibrium is termed as static equilibrium. when a body is in state of uniform motion and the resultant of all the forces acting upon it is zero then it is said to be in dynamic equilibrium

Answer 2

This slide defines what w mean by “static equilibrium.” Since torque is defined in terms of force, each of these conditions of equilibrium represent a mathematical statement about the applied forces that must be true if a rigid body is in static equilibrium. These conditions of static equilibrium are often used to predict the static forces -- tensions and other stresses -- that exist in structures that are in static equilibrium.

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