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Pull down in the middle a heavy chain, fixed at both ends, in such a way that it forms a triangle. Does the centre of mass takes up a higher or lower position? A. Centre of mass comes downB. Centre of mass goes upC. Centre of mass remains stationaryD. Cannot be predicted |
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Answer» Correct Answer - B Ans.(2) system always want to maintain the states of lowest PE. So, disturbing the system will result in increase of PE So, potential enery of the system increases, hence centre of mas goes up. |
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