What term describes a load on an object that varies over time?

The term that accurately describes a load on an object that varies over time is "dynamic load." This concept contrasts with static loads, which remain constant and do not change in magnitude or direction. Dynamic loads occur when forces are applied in a way that causes fluctuations, such as during lifting, moving, or when external forces like wind or vibrations affect the object.

In the context of forklift operations, a dynamic load might be experienced when the forklift is carrying a load that shifts or when the load is subject to movement or impact. Understanding dynamic loads is crucial for ensuring that forklifts are operated within safe limits, as these variations can affect stability and safety during operation.

The other terms refer to different load conditions; for example, a static load does not change and remains steady, while a fixed load implies it is permanently attached and does not vary. The term "alternate load" is not commonly used in this context, making "dynamic load" the most appropriate term for describing varying loads.