construct a beam balance using a hanger, two paper cups and thread. explain how it works
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https://www.tactivity.in/Guide/Beam+Balance+Model/145
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Explanation:
A beam balance is used to measure the mass. It consists of a horizontal beam, supported at its centre. The beam can move freely about its support and a pointer is attached to the centre of the beam. ... Then the sum of the known masses gives the mass of the object.
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