Pulley

Pulleys primarily belong to the category of simple machines, among other mechanisms, such as a lever, inclined plane, and screw. It is one of the mechanical devices which convert an applied force into energy. Besides, it also alters the direction and magnitude of force for mechanical advantage. 

Therefore, it becomes vital to understand the pulley meaning to differentiate it from other forms of simple machines. 


What is a Pulley? 

The pulley definition refers to a wheel that constitutes a cord surrounding its rim. These devices mainly contribute to mechanical advantage while lifting weights above the ground level. You can see this instance of mechanical devices mounted on a well to pull buckets of water. 

As a result, it forms one of the main factors to reduce reliance on limited human strength. Also, this mechanism manipulates the direction of force to make specific processes efficient. As a result, it acts as a force multiplier. 

On the other hand, a pulley set may contain one or more wheels as per one’s requirements. In the case of multiple wheels, you can refer to it as a compound pulley. 


What is the Description of a Pulley? 

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This image will undoubtedly help you to form an idea about pulley description. Here, a rope passes along the grooved rim and links to a weight attached on the right side. On pulling the rope downwards, the load moves in the upward direction. 

It points at the fact that the direction of the force applied is not identical to the force acting on the weight. Therefore, this machine transmits the power of hands on to the object linked to the load. 

Since pulleys function as force multipliers, they go beyond the limited human strength to displace weight. As a result, these have appeared at various points of human civilization as a means to simplify a person’s daily efforts. 


What are the Types of a Pulley? 

Of all the types of pulley available in today’s world, you will learn about the three most prominent categories. It will help you to gauge the range of these simple machines in use across various walks of life. 

Therefore, the Different Kinds of Pulley are as Follows – 

  • Fixed Pulleys –

This category of pulley links to a rigid structure and are, therefore, immovable. These structures usually include a ceiling, floor, or a wall. As a result, this system is stationary. However, the rope is free to move and operate accordingly. 

This particular system provides the option to alter the direction of the force implemented. Besides, it eliminates the need for a person to lift a heavy object off the ground. Fixed pulley examples include the ones mounted on a deep well. 

  • Moving Pulleys –

These offer a substantial mechanical benefit concerning fixed pulleys. Unlike the latter, a moving pulley wheel does not link to a rigid structure. Instead, one end of the rope connects to a stationary structure. 

Moving pulley meaning suggests that the constituent wheels carry the weight attached instead of the rope. If you pull the rope accordingly, the weight shifts from one position to another. Therefore, it involves a decreased amount of work to operate this category of a pulley. 

  • Compound Pulleys –

Compound pulley meaning combines the functions of both fixed and moving pulleys. In this case, the movable pulley links with the rope attached to a fixed one. Accordingly, one can mount the weight on the movable wheel to shift its position. It helps one to redirect force as per one’s requirements, while also altering the overall workload of that force. 

Therefore, this sums up the three distinct types of pulleys. 


What is the Pulley Formulae? 

The several kinds of pulley formula include the following – 

  • Mechanical advantage – Load/Effort. 

  • Velocity ratio – It refers to the ratio of the distance traversed by the effort to the distance traversed by the load. 

Therefore, velocity ratio = distance (effort)/distance (load). 


Applications of Pulleys 

Following are the Uses of Pulley – 

  • It acts as the primary working technology behind an elevator. 

  • Gym equipment uses various pulleys. 

  • A pulley finds application while hoisting a flag. 

Since you know the pulley meaning now, browse through a range of similar topics to know more. You can also download our Vedantu app to benefit extensively from a personalized and interactive learning experience.

FAQ (Frequently Asked Questions)

1. What is a Pulley?

Ans. A pulley is a simple machine that combines a wheel and a rope to act as a force multiplier.

2. What are the Types of Pulley?

Ans. The prominent types of pulley are fixed, movable, and compound pulleys.

3. What is the Velocity Ratio of a Pulley?

Ans. Velocity ratio of a pulley refers to the ratio of distance traversed by the effort and distance traversed by the load.