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Hello guys. Really need your helps. When I construct an equation(moment about point O), do I have to include the rod's mass also? Ive heard that I can neglect the rod's mass due to equilibrium equation. On the other hand, Ive also heard that I can only neglect mass if the point of mass is supported. Appreciate if you could show me the equation. Thanks in advance. * For some reason I cannot attached the image.*

2. Relevant equations

3. The attempt at a solution

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# Single Degree of Freedom Equation of Motion(Newtons Second Law)

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