A moment in physics refers to the turning effect of a force on an object. It is the product of the force and the perpendicular distance from the point of rotation to the line of action of the force.
Equilibrium is a state in which all forces acting on an object are balanced, resulting in no net force or acceleration. In terms of moments, equilibrium is achieved when the sum of clockwise moments around a point is equal to the sum of counterclockwise moments around the same point.
For a body to be in rotational equilibrium, three conditions must be met: 1) the sum of all external forces acting on the body must be zero, 2) the sum of all external moments acting on the body must be zero, and 3) the body must not be experiencing any linear acceleration.
Moments and torque are closely related, as torque is the measure of the turning effect of a force on an object. In other words, torque is the rotational equivalent of force, and both are calculated by multiplying the magnitude of the force by the distance from the point of rotation.
Yes, it is possible to have rotational equilibrium without having translational equilibrium. This occurs when the sum of all external forces acting on a body is zero, but the body is experiencing a rotational motion due to the unbalanced moments acting on it.
