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Why would you use a single fixed pulley to lift a box if the pulley's mechanical advantage is 1?
Wiki User
∙ 13y ago
Because it's more convenient. The pulley in this case is not giving a mechanical advantage, but it is allowing you to locate the motive force somewhere other than directly above the box, which can be significant in that you can, for instance, tie the other end of the rope to a horse or a car on the ground, whereas it might be difficult to persuade either of those things to climb a ladder.
Even without that, using a pulley allows you to use your own weight to help lift the box. To lift it from above with a rope, you'd actually have to pull up on the rope. To lift it from below with a pulley and rope, you might just be able to hold onto the rope and relax your legs, letting gravity do some of the work for you.
Wiki User
∙ 13y ago
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What is the mechanical advantage of a single fixed pulley?
Thew pulley changes the direction of the effort force.
What is the advantage of a moveable pulley?
A single movable pulley gives you a 2:1 mechanical advantage. You can lift move 20 pounds with only 10 pounds of effort.
What is the advantage of a pulley?
Of a single pulley wheel, only that it changes the direction of the force ie: from overhead. > 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
What kind of pulley changes the direction of input force but does not change amount of force you apply?
A single pulley alters the direction of the input but confers no mechanical advantage.
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.
Which is better a incline plane or pulley?
A single pulley simply changes the direction of the force. A block and tackle or multiple pulleys can offer a mechanical advantage - same as an inclined plane. For the same mechanical advantage, a pulley system may be better because of lower friction.
What is the mechanical advantage of a stationary pulley?
Its 1 you need more than 1 to improve mechanical advantage i think it's 2 A single pulley means one axel, making the IMA = 1. A double pulley's IMA would = 2, and so on and so forth.
Why does a fixed pulley have a mechanical advantage of one and a movable pulley has a mechanical advantage of two?
we find mechanical advantage of pulley by using principle of lever. according to this moment of effort is equal to moment of moment of load. As in this case effort arm is equal to load arm. so mechanical advantage is equal to one. but we know we can never finish friction between rope used and pulley so mechanical advantage is less than one
Which type of pulley has an ideal mechanical advantage of 1?
A single fixed pulley (:
The simple machine that provides a mechanical advantage of one?
Single fixed pulley
Why is mechanical advantage of single fixed pulley less than single movable pulley?
because lifes hard
What is the mechanical advantage of a single fixed pulley?
Thew pulley changes the direction of the effort force.
Which is the simple machine that provides the mechanical advantage of 1 the screw second class lever single fixed pulley or single movable pulley?
Single Pulley
What is the mechanical average of a single movable pulley?
I think what you want is the "mechanical advantage". It's 2 .
What is the mechanical advantage with a pulley?
Depending on how the pulley is mounted and how the rope is strung, the M.A. of a set-up with a single pulley is either ' 1 ' or ' 2 '.
What is the mechanical advantages of a pulley?
A single pulley has no mechanical advantage, it just changes direction.
What are 2 different kinds of pulleys?
single fixed pulley, single movable pulley and single fixed and movable pulley. :-)
