What type of system is referred to as a simple rope-and-pulley system used to lift loads?

A simple rope-and-pulley system used to lift loads is known as a block and tackle. This system consists of multiple pulleys (also known as sheaves) arranged in a way that helps to multiply the force applied to lift a load. The arrangement works by passing a rope through the pulleys, where each pulley reduces the amount of force needed to lift a heavier object, thereby making lifting easier.

In a block and tackle system, the combination of fixed and movable pulleys allows the user to gain a mechanical advantage, which means less force is required to lift the load compared to lifting it directly without any pulleys. The setup can efficiently support and manage heavy weights, making it ideal for construction and rigging tasks.

Other systems mentioned, such as the hoist mechanism and winch system, serve different purposes or incorporate additional elements, but they do not specifically refer to the simple function of a block and tackle as it relates directly to the basic lifting configuration of ropes and pulleys.