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A single fixed pulley changes the direction of the force applied, making it easier to lift heavy objects by allowing you to pull downward instead of lifting vertically. However, it does not provide any mechanical advantage in terms of reducing the amount of force needed to lift the object.
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How does a pulley help you do work?
A single pulley is one of the "simple machines" in physics, and makes work seem easier by redirecting the action required to work along with gravity. For example, you can lift something by by pulling down on a rope.<br><br>Multiple pulleys make work even easier, but you need to do more of it: running a rope through six pulleys will make the load seem 1/6 as heavy, but you'll have to pull the rope six times as far.<br><br>A handy guide to the simple machines is here: http://teacher.scholastic.com/dirtrep/Simple/pulley.htm<br>
What is the mechanical advantage of the pully seen here?
The mechanical advantage of the pulley system can be calculated by counting the number of ropes supporting the load. In the diagram with a pulley supporting a load with four sections of rope, the mechanical advantage would be 4. This means that the force required to lift the load is divided by 4 compared to lifting it directly.
What is the difference between a pulley and a sheave?
A pulley has a bearing that it rides on and a sheave wheel usually has a brass sleeve in it to ride on. A pulley usually has a higher rpm and can take more stress than a sheave wheel. Sheave wheels can have bearings in them, but open ones as opposed to sealed ones in a pulley. Again this has to do with the amount of load required.It is possible there is no difference. Sailors usually call the 'pulleys' on their boats. 'sheaves'. pronounced 'shivs'. Anyway, the word 'sheave' in English originated in German and means 'pulley'. so go figure.*************OK, so here's a 30-year mechanic's answer. Regardless of what the original terminology was, I believe it has come to mean this: A sheave is a pulley wheel (now referred to as a pulley without the word wheel) that has a grooved circumference. Its original purpose was to transmit and/or multiply mechanical power because it is part of a lever system. A pulley also transmits power, but it is not grooved. Examples: 1) the idler pulley of your car engine, which usually acts as a spring loaded belt tensioner. 2) the guide pulley (known as a sprocket) that shifts the chain from one sprocket to another on the back of a bicycle. 3) the drive belt pulley on a farm tractor used to power old fashioned implements. None of these have grooves.So, a sheave is a pulley, but a pulley is not a sheave. Either word should get your point across. It has nothing to do with bearings versus bushings. BTW, a "bushing" used as a load bearing surface is really a bearing, it's just not a roller, tapered roller or ball bearing, but that's another argument.
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Would you use a fixed pulley or movable pulley to lift a heavy load?
Fixed if it weighed as less than you, but a movable pulley wouldn't be helpful here. You'd be best with a pulley with multiple supporting ropes.
Why does a fixed pulley provide only a mechanical advantage of 1 how does this type of pulley affect the force?
wiki answers does not yet have an answer to this question. If you know it feel free to submit your answer here
What part of speech is fixed?
The elderly woman is on a fixed income. Here, fixed is an adjective. He fixed the broken television. Here, fixed is a verb.
What is the legal blade length for a fixed blade single edged knife for concealed carry in Missouri?
The max length for a folding knife is 4". I am not sure what the length is for fixed blades, but will find out. here is a helpful link.http:/homezperiodznetcomzperiodzcom/~brlevine/stazhyphenzlawzperiodzhtm
Which timing mark on cam is used on 1990 Honda civic?
Single cam engines As you look at the cam pulley the correct mark is at 7 o'clock with the two other marks at 3 & 9 o'clock positions. As it is not easily possible to post a drawing here, My email address is on my bio page if you need further help
What is the the variable costs plus the fixed costs?
Type your answer here... fixed cost + variable cost = total cost
Where is the tensioner located on a 1999 Ford Escort ZX2?
Just above the A/C pulley. The a/c pulley is a large ribbed pulley that has 3 bolts and a triangular plate on it. The tensioner is small and smooth and is just above the a/c pulley. more info and a pic here. http://www.rldassociates.com/zx2/howto/belt.htm
What kind of nationwide support groups are there for just single parents?
There are many nationwide support groups for single parents, such as: single parents in college/university, single parents looking for companionship and help of other single parents, those in need for financial advice/help, single parents seeking to adopt a child, and also young single parents. Here is an article about single mothers support group: http://www.basearticles.com/Art/260379/127/Single-Mothers-Support-Groups.html
Do male and female cats have different snouts?
here i will help you, get a life, get married! and get rid of your cats. cats do nothing for you! if your single, then that's your problem you welcome, ill be here til Tuesday! BLAHHHHHBAAA
Where can I find a pulley that children ride from one tree to another tree downhill on an airplane wire with a handle on the pulley I had one as a child.?
The toy you are looking for is called a zipline. One company that sells them is here: http://ziplinehomekits.com/ and another one is here: www.ThinkFastToys.com/Zip_Lines
Can an annual revenue of 2 301 288.50 cover fixed cost if fixed cost represents 50 percent and variable cost represents 50 and rent represents 30 percent of fixed costs?
that'll depend on how much is your total cost. A good decision making tool that can help you here would be break even analysis. Formula = Fixed cost / Contribution per unit.
What is the name of the simple machine that consists of a rope passing around a grooved wheel?
Type your answer here... Pulley
