It acts as torque-multipier by trading distance for effort.(as you know from your basic physics, WorkDone = Force XDistance.
So if you replace a 1:1 arrangement witha 2:1 pulley, you needto pull twice as much rope but with only half the tension - though you will use the same energy overall!
Single fixed pulley
Fixed Pulley!!
we find mechanical advantage of pulley by using principle of lever. according to this moment of effort is equal to moment of moment of load. As in this case effort arm is equal to load arm. so mechanical advantage is equal to one. but we know we can never finish friction between rope used and pulley so mechanical advantage is less than one
Its 1 you need more than 1 to improve mechanical advantage i think it's 2 A single pulley means one axel, making the IMA = 1. A double pulley's IMA would = 2, and so on and so forth.
Single Pulley
The mechanical advantage of a combined pulley system is equal to the number of supporting ropes or lines attached to the moving pulley or block. For example, a system with two supporting lines would have a mechanical advantage of 2, making it easier to lift a heavy load. The mechanical advantage allows for less force to be exerted to lift a heavy object.
Depending on the type of pulley system you have (Fixed/ movable/ combined pulley) using either of these will give you mechanical advantage. The different pulley types are designed to even the weight of the object your pulled out, this will enable you to lift heavier objects with a lighter pull
An example of a combined pulley system is a block and tackle, where multiple pulleys are used together to increase mechanical advantage, making it easier to lift heavy loads. This system is commonly used in sailing to hoist and control sails.
fixed and movable pulleys can be combined.
The kind of pulley has an ideal machanical advantage of 2 is called "Movable Pulley". From, Bryan Hollick
a directional advantage
The simple pulley is the type of pulley that does not have a mechanical advantage.
A fixed pulley does NOT multiply the effort force or have a mechanical advantage. It only changes the direction of the effort force. A free pulley multiplies the effort by two. this means the free pulley has a mechanical advantage of 2.information from:www.mhscience02.com
A combined pulley system allows for the distribution of weight over multiple ropes, which can reduce the amount of force needed to lift an object. This type of system also offers increased mechanical advantage, making it easier to lift heavy loads. Additionally, combined pulleys can change the direction of a force, allowing for more versatile applications.
Pulley reduces the force given to get the work done. There are amny types of pulleys. Examples are fixed pulley, movable pulley and Combined pulley.
hanika
The formula to calculate the mechanical advantage of a pulley system is MA 2 number of movable pulleys.