These homemade pulleys work great as long as they glide freely over the coat hanger wire (meaning that if you give them a spin, they keep spinning for a few more seconds). You can adjust the amount of friction in the pulley by adjusting the where the metal wire bends after it emerges from the pulley.
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Continue with the lessons in this section, and you’ll see more information on pulleys.
This shows how to make a pulley, but where do you describe what a pulley is actually used for?