Pulleys

It can pull something that may be very heavy too.This is the benefit of a pulley that it can pull heavy things because it has pulley that increases the amount t=of the pull or force that is being applied.

A fulcrum is a fixed point on which a lever pivots. It allows the lever to rotate around it, enabling the lever to lift or move objects with less force. In simple terms, the fulcrum helps to magnify the force applied to one end of the lever to lift or move objects on the other end.

It is a rope fitted around the rim of a fixed wheel. Some pulleys increase the force that is applied to them .Other change the direction of the force.They are used to raise and lower things such as elevator cars.
It is just that - a pulley.

The three types of pulleys are fixed pulleys, movable (or movable) pulleys, and compound pulleys. Fixed pulleys change the direction of the force applied, movable pulleys provide a mechanical advantage by reducing the force needed, and compound pulleys combine fixed and movable pulleys for increased mechanical advantage.

A disadvantage of a fixed pulley is that it does not provide any mechanical advantage, meaning it does not change the direction or magnitude of the force applied. This can make it challenging to lift heavy loads without additional force.

A fixed pulley does not provide any mechanical advantage, meaning it does not reduce the amount of force needed to move an object. Additionally, it changes only the direction of the force applied, not the magnitude.

Some examples of pulleys include clothesline pulleys, flagpole pulleys, and elevator pulleys. Pulleys are simple machines that consist of a wheel with a groove around its circumference and a rope or belt that moves around the groove to lift or lower objects.

The method to calculate mechanical advantage is easy to remember and is necessary when rigging the assembly to accomplish the job. The mechanical advantage of a rigging that will require upward pull can be determined by counting the number of rope lengths running between engaged pulleys and those doing the work. Likewise, if the assembly will require downward pull, count the ropes and subtract one to get the mechanical advantage number. The subtraction is necessary because with the fixed pulley, the downward pull equals the load on the other length of rope so the last "pull" rope does not provide any mechanical advantage.

A moveable pulley reduces the amount of force needed to lift an object by distributing the load between two sections of the rope. This type of pulley system also allows for the direction of the lifting force to be changed, making it easier to lift heavy objects vertically.

No, a fulcrum is the pivot point for a lever

A double pulley system is simple. Instead of one wheel like the

single pulley system has, the double pulley system has two

wheels and carries more heavier loads than the single pulley system

can hold.

A single pulley system consists of one pulley that is attached to a fixed point. It is used to change the direction of a force, making it easier to lift or move objects. By reducing the amount of force required, a single pulley system can increase efficiency in lifting operations.

Of a single pulley wheel, only that it changes the direction of the force ie: from overhead.

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On a block and tackle system, 2 or more pulley wheels are used in a certain way to produce mechanical advantage.

The simplest type of block and tackle offers a mechanical advantage of 2

The formula for the mechanical advantage of a pulley system is MA = 2 * (number of support ropes). This means that for every additional support rope, the mechanical advantage of the pulley system doubles.

its not to push or pull an object its a simple machine made from a grooved wheel with a rope or cable wrapped around the groove.

Gears Are Relevant To Pulleys Because Gears Turn Into Circles So Do Pulleys The Difference Between A Gear And A Pulley Is...

A Pulley : Pulley Has Strings To Hold On One Goes Up And The Other One Across

A Gear : A Gear Has No Strings To Hold On

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In the past, pulleys were commonly used for lifting heavy objects, such as in construction, mining, and agriculture. They allowed people to move loads more easily by distributing the weight and reducing the amount of force required to lift objects.

Condenser lamp is a laboratory apparatus used to cool hot vapors and liquid. This typically has a large glass tube containing smaller glass tube running the whole length where the hot liquids pass.

Yes, a movable pulley is attached to the load it moves. It is designed to reduce the effort required to lift an object by distributing the force needed to move the load evenly between the pulley and the person pulling the rope.

There are three main types of pulleys: fixed pulleys, movable pulleys, and compound pulleys. Fixed pulleys are attached to a structure and change the direction of the force applied. Movable pulleys are attached to the object being moved and provide mechanical advantage. Compound pulleys combine fixed and movable pulleys to increase both the weight capacity and mechanical advantage.

A single fixed pulley is a type of pulley that is attached to a fixed structure, such as a ceiling or a beam. It changes the direction of the force applied to lift an object, making it easier to lift heavy loads by redirecting the force needed. However, it does not provide any mechanical advantage in terms of reducing the effort required to lift the object.

A pulley is a mechanism with a wheel and a simple frame that can be connected to something, either a fixed object or a movable object. The purpose of the pulley is to decrease friction when redirecting the pull/force of a rope, chain, or some equivalent thing. A pulley creates mechanical advantage only when configured in a particular way (see below).

How and in what configuration is explained below, but in essence, for every strand of rope/cable/chain or its equivalent in a continuous system, the force is divided equally. How the rope exits the system determines whether or not the final strand should be counted in the division. A strand exiting from a fixed pulley is not counted, where as a strand exiting from a movable pulley is counted.

A pulley system creates mechanical advantage by dividing force over a length of rope or its equivalent, that is greater in length than the maximum distance the load can travel by using the pulley system. Through the use of movable pulleys or their equivalent, a system creates a mechanical advantage through the even division of force over multiple rope strands of a continuous rope. As rope, or its equivalent, is removed from the system, pulleys, or their equivalent, allow the side of the rope to apply force to the load. As the the system contracts, the load is lifted or moved (depending on the direction of the pull). The more strands created by the configuration, the greater the mechanical advantage. This is because every strand of rope or its equivalent created by the configuration of the system will take an equal amount of length of rope removed as the system contracts. Thus if there are three strands of rope created by the system, and three units of rope are removed from the system, each strand will contract by one unit. As the strands are parallel, or function in as parallel the overall contraction of the system is one unit, moving the load only one unit for every three units of rope removed. By distributing the force needed to move the load one unit over three units of the rope, this decreases the force needed on the pulling end by 1/3. This would be a mechanical advantage of 3:1.

One of the most common systems of mechanical advantage is a shoe lace system. The grommets of the system are the equivalent of movable pulleys. As lace is removed from the system, force is applied to grommet, contracting the system. The laces are much longer than the space that they are contracting, and to fully contract the space nearly all the lace must be removed, so we can clearly see that many more units of lace must be removed for every one unit of contraction in the system, thus mechanical advantage is created. Of course in a lace system friction quickly overcomes and limits the advantage created. But on the other hand the friction helps to hold the force exerted allowing you to cinch up you shoes more easily. Now with this example in mind, let's look at a more traditional pulley system.

The easiest way to understand how mechanical advantage is achieved may be to focus on the geometry of the system. Specifically by focusing on how force is applied to the load and why the configuration of movable pulleys distributes force and creates mechanical advantage.

Imagine a weight to which a rope is directly attached. The rope is fed though a pulley mounted on the ceiling (fixed pulley). If you were to pull the rope the weight would move up a distance equal to the length of rope pulled. This is because the rope is directly attached to the load. There is no mechanical advantage.

If we want to create a mechanical advantage we must attach a pulley to the load/weight so that force is applied via the rope's contact with the movable pulley .

So in the next scenario imagine the rope is directly attached to the ceiling, and is fed through a pulley attached to the load (movable pulley as the load can move). The distance from the movable pulley to the ceiling is 10 feet. Now imagine you were to grab the rope exiting the pulley (imagine the system has no slack), and raise it to the ceiling. Now you have 10 foot section of rope with both ends on the ceiling. Where does that leave the load? Since the load is connected to the system by a wheel that can travel over the rope it has not followed the end of the rope the 10 feet to the ceiling, instead it has stayed in the center of the rope, constantly dividing the distance of the remaining section of rope. The load will now be 5 feet from the ceiling (10 feet / 2 section of rope). It has move only 1 unit of distance for every 2 units the rope has moved. Therefore only 1/2 the force is needed to move the rope 1 unit. This movable pulley system therefore has a 2:1 mechanical advantage.

Now we will add another pulley to the ceiling. This is a fixed pulley and will not add any mechanical advantage, but will only redirect the force applied to the system. If we add another pulley to the load we will then have added mechanical advantage. When calculating the advantage added, you must observe the movable pulleys and their relationship to the load.

Imagine a system with a rope directly connected to a load. The rope travels through a fixed pulley on the ceiling to another pulley on the load and back up to a fixed pulley on the ceiling, and back down to the ground where it can be pulled. Drawn on paper this system will have four rope strands. For calculating mechanical advantage you must not count the strand exiting the final fixed pulley as the final fixed pulley only redirects force and does not add mechanical advantage. (if the system was to end with a pulley attached to the load you would want to count the final strand). In this scenario we have three strands of rope contributing to the mechanical advantage of the system so the advantage should be 3:1. But how can you prove this. Imagine each section is ten feet long. Thus we have 30 total feel in the system. We pull out 10 feet of rope, how far has the load traveled? Well, we know we now have 20 feet of rope in the system distributed over 3 equal strands of rope. That would make each strand approximately 6.66 feet long. The load would therefore be approximately 6.66 feet from the ceiling or 3.33 feet from the ground (10 - 6.66). By traveling only 3.33 feet for 10 feet of rope removed from the system we have 3:1 mechanical advantage ratio (10:3.33).

A final thought exercise to intuitively understand what can be a very unintuitive process. Imagine a 10 ft tall pulley system. Now focus on the amount of rope in the system. If you have three strands going back and forth you will have 20 to 30 feet of rope in the system (depending on if the final pulley is attached to the load or a fixed point). If you have four strand you'll have 30 to 40 feet. The particular amount is not important. What is important is to see that the only way the load can travel the 10 feet to the top of the pulley system is for nearly all the rope in the system to be removed be it 20, 30, 40, 50... ect. The more rope that must be removed and the more strands that divide the amount removed, the greater the division of the force over the rope and the less force is required on the pulling end of the system.

Of course this is a basic pulley system. If you attach pulley systems to pulley systems (piggy back systems) you can begin doubling forces quickly, and strands need not be equal in length for their dividing power to function. Z rigs, trucker's hitches, and others create mechanical force through attaching or creating a movable pulley to/on the rope. The overall geometry of the systems and the relationships of elements stay the same as does the reason for the mechanical advantage.

It is also important to note that there are configurations where a pulley or its equivalent may not be "movable", but mechanical advantage is created. Imagine multiple pulleys fixed to a ceiling and floor of a room. If one end of a cable was fixed to either the floor, ceiling or one of the pulleys and the system was threaded, it certainly would be creating a mechanical advantage. Though all pulleys are technically "fixed" the opposition force is magnified just as in any other system, and depending on the strength of the cable, ceiling, or anchors, one element may eventually fail because of the tension in the system. The amount of tension in the system is created though the mechanical advantage of the configuration, and though nothing may move but the cable, magnified force is applied to the elements of the system.

In summary, it may be helpful to focus on the geometric relationships in pulley systems to better and more intuitively understand the way in which they create mechanical advantage.

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The disadvantage of a fixed pulley is that if it's not fixed in a location where you need it, it's used less.

A fixed pulley has a mechanical advantage of 1, which means it doesn't provide any mechanical advantage in terms of force. It changes the direction of the force applied without multiplying it.