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What  pulleys are made up of which element?

Apps-On-Physics Simple-Machines 02-03 min 30-40 sec 06-05-20, 11:20 a.m. Vidhya06

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<span class="tL8wMe EMoHub" dir="ltr" id=":1mp.co" style="text-align: left;">Pulleys are made up of cast iron, which is an alloy of iron and carbon. They are also made up of forged steel or wood. </span>
06-05-20, 2:37 p.m. karwanjehimanshi95

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