For a Body to Be Equilibrium Under the Combined Action

Multiple Choice

For a body to be equilibrium under the combined action of several forces:

A) all the forces must be applied at the same point
B) all of the forces are composed of pairs of equal and opposite forces
C) the sum of the components of all the forces in any direction must equal zero
D) any two of these forces must be balanced by a third force
E) the lines of action of all the forces must pass through the center of gravity of the body