Dynamic loads are caused by which of the following?

Dynamic loads are caused by which of the following?

• A. Sudden lifting, stopping or swinging
• B. Slow movement
• C. Constant weight
• D. No load

Answer: (A)

Dynamic loads come from sudden changes in motion rather than a constant weight. When you lift a load abruptly, the inertia of the mass resists the acceleration, so the tension in the lifting line rises above the load’s static weight. The same inertia causes a spike when you stop abruptly, as the load resists deceleration. Swinging loads introduce changing directions and speeds, which also produce peak forces in the rigging. In short, dynamic loads are the extra forces created by acceleration, deceleration, or motion, not by a steady weight. Slow movement or a constant weight are essentially static loads, and no load means no force.

Dynamic loads come from sudden changes in motion rather than a constant weight. When you lift a load abruptly, the inertia of the mass resists the acceleration, so the tension in the lifting line rises above the load’s static weight. The same inertia causes a spike when you stop abruptly, as the load resists deceleration. Swinging loads introduce changing directions and speeds, which also produce peak forces in the rigging. In short, dynamic loads are the extra forces created by acceleration, deceleration, or motion, not by a steady weight.

Slow movement or a constant weight are essentially static loads, and no load means no force.