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Asked by Francis

A uniform metre rule AB is balanced horizontally at the 90cm mark with mass 0.2kg suspended from B. Calculate the mass of the metre rule
4 years ago

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Answered by oobleck
if the density of the rod is x kg/cm, then consider the mass of each part of the rod as being a point at the center of that part.
90x*45 = 10x*5 + 0.2*10
4 years ago

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