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Why should the pulley be a light as possible as well as nearly frictionless?
Wiki User
∙ 10y ago
Scholars,
The pulley should be as light as possible so it is easier to rotate. It should be nearly frictionless so no energy is wasted yielding a greater net force
Wiki User
∙ 10y ago
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Why should the friction in the pulley the mass of the string and the rotational inertia of the pulley be all small?
Because then you don't have to include those things in your equation when you're working out the answer.
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.
What are the advantages and disadvantages of using a pulley?
Advantages - a pulley allows you to apply force in any direction, not just the one in which the force is to applied. Multiple pulleys yield a mechanical advantage that can allow the lifting of heavy weights. Disadvantages - the pulley has to be securely anchored to support the mass being acted on, and the rope has to be strong and durable. A wheeled pulley needs to rotate smoothly, and a sliding (e.g. wooden) pulley should not abrade the rope. Also, the more pulleys you use, the more rope you need. You need to consider the strength of the pulley's anchorage. If you try to raise a 40 lb load using a rope over a single pulley hung from the roof with the 2 legs of the rope parallel, the force on the anchorage will be 2 x 40 = 80 lbs.
Should friction be reduced if possible?
no not really
State the critical speed ranges should passed through as quickly as possible?
State the critical speed ranges should passed through as quickly as possible?
How do you adjust pulley alignment on 1992 dodge caravan with a 3.3 liter engine?
If you have the correct pulley and two clean surfaces, the pullies should match fine and no adjustment is needed for alignment. It is possible you do not have clean surfaces or the pullies are not the correct ones.
What is the path for the serpentine belt on the 01 Taurus?
should be a sticker on fan shroud Alternator, idler pulley, power steering, a/c, tensioner pulley, crankshaft pulley, water pump this is the order cant upload the picture but when placing the belt on if the pulley has the grooves in it the grooved side of the belt should face the pulley and if the pulley is smooth then the back of the belt faces the pulley
How do you align the timing marks for a 2.2 liter Toyota engine?
Timing mark on the crankshaft pulley (mark should be at zero) must be aligned with the mark on the camshaft pulley (mark should be in the middle of the hole in the pulley).
Where is the water pump on a 1996 ford probe se?
Should be the pulley just above the crankshaft pulley
How do you remove the idler pulley for a 3.8 liter?
Should only be one bolt in the middle of the pulley that releases it.
Where is the water pump located on a Ford Expedition XLT?
The water pump pulley is the pulley right above the crank pulley (the big pulley in the bottom of the engine.) Right above the water pump pulley should be the alternator pulley, which drives the alternator. I'm guessing the water pump is behind the WP pulley. == == == ==
How do you replace a tension pulley on a dodge truck?
The tension pulley should have a bolt that holds it on, allowing you to replace the unit.
The pulley for the serpentine belt sheared off. I have a new pulley and need to know how many washers should be on the front and behind the pulley to work properly?
It shaves a belt.
How remove crankshaft pulley on Corvette?
it should be on the instructions or when you get the car they should tell you
How do you put on a water pump pulley for the serpentine belt on a 1995 Chevy Lumina minivan?
there should be 3 or 4 bolts that hold pulley on, just remove these bolts a pulley should come off. but remove belt first ! if pulley keeps turning while removing bolts. you can hold it stationary with a scredriver or similar.
How should you use pulley to maximize its effectiveness?
pull the E
How do you remove engine crank pulley 1998 jetta?
Loosen the 18mm bolt about 4 or 5 mm and give the bolt a good wack and the pulley should pop. Then remove the bolt and pulley.
