![]() In has to equal the work out, we know that the force I'm Whatever I pull, if I pull aįoot down here, this weight will move up by a foot, so theĭistance that I pull here is equivalent to the distance Going to move up exactly the same amount. It down 10 feet or some arbitrary distance, what To hold the rope at that point, and if I were to pull To pull, you know the mechanical advantage. That it travels versus the distance that you have That the object you're trying to move travels? And if you know the distance What happens to the lengths of rope? Or what is the total distance Weight in order to produce 10 Newtons of force upwards? Well, in any pulley situation-Īnd I don't know if textbooks cover it this way,īut this is how I think about it, because you don't Pull down in order to lift this weight, this 10-Newton The mechanical advantage of this system? What is the force that I have to Have a weight, a 10-Newton weight, and I'm going to pullĭown on this end to make the weight to go up. The rope can go over it and move without havingĪ lot of friction. But let's say I have that littleĭisk where the rope goes over and it rolls so that ![]() The mechanical advantage inherent in these Problems in the past, but now we'll actually understand what On pulleys, which is another form of a simple machine. ![]() cause it can't embrace the way of using less than 1 MA in the opposite direction (distance to force) but to be a bit frank and technical, i think the word of mechanical advantage is somehow narrow. In short, MA is way of balancing force and distance to do the same total work as W = Fd. then you can do the same job of 20N with your 40N hands only for a 1/2 distance (and thus time) but have not much patience to do that for a long distance or time. you have 40N of force with your hands to lift up the same weight above. You can use the opposite machine with 0 < MA < 1 too. you need to apply this force 2x distance (and thus time) Say if you have a maximum 10N force with your hands but you want to life up an object with 20N gravitational force anyhow, it might be physically impossible to do that in any direct mannerīut with a help of machines of MA=>2 like pullies or wedges, you can do it only with 10N (half of required force). You can think of a mechanical advantage as a kind of work transfer system (from force to distance)
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