Pulleys question - Need a rig to lift with a MA=107?

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The discussion centers on the mechanical advantage (MA) of a pulley system designed to lift a weight of 3200 lbs using a 30 lbs weight, achieving an MA of 107. The user confirms that pulling the lighter weight down by 107 cm results in the heavier weight moving up by only 1 cm. The user inquires if it's possible to increase the movement of the heavier weight without increasing the force required, to which the response is a definitive "No." This indicates the limitations of mechanical advantage in pulley systems.

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gruff
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Hi

I have an installation/art project that requires a rig designed to balance a weight of 3200lbs using a weight of 30lbs. I think that means a mechanical advantage of 107 if using pulleys? Both weights would be suspended in the air by the rig so that someone pulling on the small weight would make the heavy weight move upwards perceptibly.

As I understand it (which is not very well!) if you pulled on the 30lb weight and moved it down 107cm the 3200lb weight would move up only 1cm. Is that right?

My question then: is there a way to make the heavy weight move more for a given movement of the lighter weight without increasing the force required?
 
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gruff said:
As I understand it (which is not very well!) if you pulled on the 30lb weight and moved it down 107cm the 3200lb weight would move up only 1cm. Is that right?

Yes.


gruff said:
My question then: is there a way to make the heavy weight move more for a given movement of the lighter weight without increasing the force required?

No.

CS
 

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