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A single pulley fixed to the top of a flagpole helps you raise a flag. What is its mechanical advantage?

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  1. 1, it only changes the direction of pull
  2. 2, it halves the force needed
  3. 4, it quarters the force needed

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References

  1. US Navy NAVEDTRA 14037: Basic Machines www.constructionknowledge.net/public_domain_documents/Div_1_General/Basic_Skills/Basic%20Machines%20NAVEDTRA%2014037%201994.pdf Checked 2026-10-12.
  2. OpenStax College Physics 2e, 9.5 Simple Machines openstax.org/books/college-physics-2e/pages/9-5-simple-machines Checked 2026-10-12.

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