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Problem about Lagrangian mechanics
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[QUOTE="etotheipi, post: 6395231"] The potential energy of the wedge is constant anyway, so isn't going to affect the equation of motion. But in any case the expression ##U = Mgy_M## isn't correct, because the centre of mass of the wedge is not the coordinate ##y_M## (that is the coordinate of the left corner). In any case they will still stumble upon the correct answer, because the mistake happens to be constant and drops out. [/QUOTE]
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Problem about Lagrangian mechanics
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