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How are fixed pulley's similar to first class levers?
Fixed pulleys are similar to, and are considered by many to be, first class levers. In a first class lever, the fulcrum of the lever is placed between the load (resistance) and force (effort). In a fixed pulley, this is essentially the same. Picture a piece of rope hanging from a ceiling from one end, and with you holding the other end. A weight on a pulley is placed in the middle. Now, if you pull up on the rope, the weight rises, just like with a first class lever. Since the load is between the fulcrum (the pulley) and the effort (you pulling up), the fixed pulley acts like a first class lever.
What is the mechicanical advantage of a moveable pulley?
2: When you pull, say, two metres of rope or chain through the pulley it rises one metre.
What does the pulley do?
The pulley is like a wheel with a string going on one side going up and around then down the other side. When you pull one side it lifts the load that is on the other side rises and when you let go the load dropps. PEACE OUT! ={)
How does pulleys make things easier?
A simple pulley as on a flagpole does avoid climbing the pole, but the effort to raise the flag is still the same. In fact there will be a small loss of energy due to friction in the pulley.You have to have at least two pulleys, before any effort is reduced.But though the momentary effort is reduced, since you are raising a mass against the gravity, the total energy consumed will be the same.Assume a rope passing over one pulley which is fastened to the roof, then dropping down round another pulley, before being fastened to the roof again. So the rope forms in total an 'S', and between the lower pulley and the roof it forms an 'U' shape.Assume your target mass is fastened to a hook on the lower pulley. Draw this.As you pull on the free end of the rope, you will have to pull two lengths (metres or feet) of rope down for each length that your target mass rises.In the overall scheme of things, you'll have to put in the same amount of work needed to raise your target mass to the roof. But the momentary effort will be halved. And you'll have moved twice as much rope as the distance your target mass rises. You have a 'mechanical advantage' of two times.____________________________________A single pulley, or two pulleys, does not magnify force, but does change the direction of the force. Three or more pulleys properly arranged (for example, in a block and tackle arrangement) can not only change the direction of a force but also magnify the force. For example, using a block and tackle hoist will allow you to lift hundreds of pounds while exerting much less force. The trade-off is that you must exert the smaller force over a longer period, which evens things out.
How does melting ice apply to the Real world?
Melting ice becomes water. Water goes into the ocean. The ocean rises, flooding coastal cities.
Why is cold temperature the best to fly a hot air balloon in?
Since hot air rises, it's because it takes less effort to get above the layer of cold air and rise up. =)
What is correct the sun rises from the east or the sun rises in the east?
The Sun rises IN the East.
What and why does carbon dioxide rises with?
it rises with healeum.
What rises on the earth when C02 rises?
temperature
What does the air do as it rises?
Air cools as it rises.
If price rises what happens to supply for a product?
it rises
As output rises AFC rises?
AFC falls
