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
Answers
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
90x*45 = 10x*5 + 0.2*10
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