Question

The condition for equilibrium is:

Options

• the resultant of all the forces acting on the body be zero only.

• the resultant of moments of all the forces acting on the body about the turning point should be zero.

• the resultant of all the forces acting on the body be zero and the resultant of moments of all the forces acting on the body about the turning point should be zero.

• none of the above

Answer 1

The resultant of all the forces acting on the body be zero and the resultant of moments of all the forces acting on the body about the turning point should be zero.

Explanation:

For equilibrium, the resultant force must be zero, so the body has no unbalanced translational effect. The resultant moment about the turning point must also be zero, so it has no unbalanced rotational effect.