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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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[–] 1 point 4 months ago* (1 child)

Wouldn't it depend on how fast that rope is pulled too, adding in the acceleration of the mass (or are you considering that with your range of 100-150)?

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  • [–] 3 points 4 months ago

    Nope. Right now the system is balanced, the rope is not being pulled just hold. To pull the weight up you need more than 50N, plus a bit more if we take into consideration the friction in the pulleys and in the rope itself.

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