Describe the mechanical advantage of a movable pulley?

Question: Describe the mechanical advantage of a movable pulley?

The mechanical advantage of a movable pulley is **2**. This means that you can lift twice as much weight with a movable pulley than you could without it.

A movable pulley has a pulley that is free to move up and down. When you pull on the rope, the pulley moves up and the load moves down. The pulley supports half of the weight of the load, so you only need to exert half as much force to lift it.

Here is a diagram of a movable pulley system:

[Image of movable pulley system]

The mechanical advantage of a movable pulley can be calculated using the following formula:

Mechanical advantage = (Number of ropes supporting the load) / (Number of ropes pulling the load)

In this case, there are two ropes supporting the load and one rope pulling the load, so the mechanical advantage is 2.

Movable pulleys are often used in combination with other pulleys to create even greater mechanical advantages. For example, a block and tackle system is a type of pulley system that uses multiple movable pulleys to achieve very high mechanical advantages.

Movable pulleys are used in a variety of applications, including construction, manufacturing, and transportation. They are also used in some sports and recreational activities, such as weightlifting and sailing.

Here are some examples of movable pulleys in use:

* Cranes use movable pulleys to lift heavy objects.

* Block and tackle systems are used to load and unload ships.

* Elevators use movable pulleys to lift people and cargo.

* Gym equipment uses movable pulleys to provide resistance for weightlifting exercises.

* Sailboats use movable pulleys to control the sails.

Movable pulleys are a simple but effective way to increase the amount of force that can be applied to a load. They are used in a wide variety of applications to make lifting and moving heavy objects easier.