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)any two of these forces must be balanced by a third force
D)the sum of the torques about any point must equal zero
E)the lines of action of all the forces must pass through the center of gravity of the body

Question

Quizplus · Accepted Answer

The condition for a body to be in equilibrium under the combined action of several forces is that the sum of the torques about any point must equal zero. This means that the clockwise torques must be balanced by anticlockwise torques, and vice versa. This condition ensures that the body does not rotate under the applied forces. Choices A, B, C, and E are incorrect because they do not fully capture the necessary conditions for equilibrium.

For a Body to Be Equilibrium Under the Combined Action