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Pulley system, demonstrating how pulleys facilitate the lifting of heavy weights (2004) (upload.wikimedia.org)
submitted 4 months ago by to c/physics@mander.xyz
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A gun tackle has a single pulley in both the fixed and moving blocks with 2 rope parts dividing the load of 100N. The mechanical advantage is 2, requiring a force of only 50N to lift the load.

Author: César Rincón

CC BY-SA 3.0

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[–] 4 points 4 months ago (1 child)

I don't think it can get as low as 100N, for that you would have to pull completely upwards. The shadow in the image implies a ceiling, so ~112N if we take 90° as the max angle. The 150N would be the only case with a completely downward force, if you pull at another angle the resulting force vector will be angled as well.

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