Learn About Compound Pulley and How It Saves Work

What is a compound pulley?

A fixed (not moving) pulley and a movable pulley are combined to form a compound pulley system (attached to the load). When compared to using solely fixed pulleys, the mechanical benefit may be higher.

Answer:

The correct statement is: Option C - Alan will save work by using the compound pulley.

Understanding Compound Pulley:

A compound pulley is a system that utilizes both fixed and movable pulleys to lift loads. It is designed to provide a mechanical advantage that reduces the amount of force needed to lift a heavy object. In the scenario provided, Alan will save work by using a compound pulley to lift the crate to the storage shelf.

How does a compound pulley work?

A simple compound pulley is made up of a rope or wire looped around two wheels – one fixed and one movable. As the rope is pulled, the two wheels move towards each other, allowing the load to be lifted with less effort. The compound pulley effectively multiplies the force applied to lift the load while maintaining the same direction of the force.

Applications of compound pulleys:

Compound pulleys are commonly used in various industries, especially in construction sites where heavy objects need to be lifted. By combining fixed and movable pulleys, workers can efficiently lift and move heavy materials such as steel and concrete with minimal effort.

Overall, a compound pulley offers a significant mechanical advantage by reducing the amount of force required to lift a load. It is an essential tool in increasing efficiency and reducing the physical strain of lifting heavy objects.