Having a hard time writing equations of motion....

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SUMMARY

The discussion revolves around the challenges faced in writing equations of motion (EOM) and determining reaction forces in a physics context. The user revised their free body diagram (FBD) to ensure unit correctness but remains uncertain about the accuracy of their new EOM and reaction forces. The conversation emphasizes the importance of correctly applying fundamental physics principles to derive accurate equations of motion.

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  • Understanding of free body diagrams (FBD)
  • Knowledge of Newton's laws of motion
  • Familiarity with equations of motion in classical mechanics
  • Basic skills in unit conversion and dimensional analysis
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  • Review the principles of Newton's laws of motion
  • Study the derivation of equations of motion in different contexts
  • Practice drawing and analyzing free body diagrams
  • Explore common mistakes in calculating reaction forces
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Students studying physics, educators teaching mechanics, and anyone seeking to improve their understanding of equations of motion and free body diagrams.

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Homework Statement


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upload_2016-11-13_18-6-58.png

upload_2016-11-13_18-11-56.png

Homework Equations


upload_2016-11-13_18-12-40.png


The Attempt at a Solution


upload_2016-11-13_18-13-24.png

upload_2016-11-13_18-14-7.png

upload_2016-11-13_18-14-42.png

upload_2016-11-13_18-17-21.png
[/B]


 
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I changed my FBD, to make the units correct. But I still don't know if this is correct.
upload_2016-11-13_18-32-1.png


My new EOM and reaction forces come out to:

upload_2016-11-13_18-32-49.png


Is this correct? Or did I mess something up?

Thanks!
 

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