How do I find $\theta$ as it $\theta (m,d,l) and AB=L$? And the cane which holds the two points particles(mass) is massless . In A the point mass is $3M$ and in B the mass is $M$ where there is no Friction in A and O . enter image description here

I tried to apply the summary of Torques equals 0 and get $\theta= \frac{4L}{3d}$ but it's not correct because it should contain $M$ in it ... so I even tried Newton's first law and I got $M=0$ which is not logical .. what are the exact forces that are affecting this solid body?

  • $\begingroup$ Did you consider the normal force at A? $\endgroup$ – walber97 Jul 3 '19 at 9:17
  • $\begingroup$ no ... what is it $\endgroup$ – user195656 Jul 3 '19 at 9:45
  • $\begingroup$ You should have to include the normal force (Force acting perpendicular to the point of contact) at A and O."A Ladder Resting Against a Wall" is a similar problem you can refer. courses.lumenlearning.com/suny-osuniversityphysics/chapter/… $\endgroup$ – walber97 Jul 3 '19 at 10:24

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