Load Attached to Free End of Constraint is the force exerted on the free end of a constraint, affecting natural frequency of free longitudinal vibrations. And is denoted by Wattached. Load Attached to Free End of Constraint is usually measured using the Kilogram for Weight. Note that the value of Load Attached to Free End of Constraint is always positive. Typically, the value of Load Attached to Free End of Constraint is greater than 0.