Free-Body Diagram: Force Vector Explained

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SUMMARY

The discussion focuses on the representation of the Force vector in a Free-Body Diagram (FBD) for two objects, m1 and m2, in a specific scenario. It establishes that the Force vector is accurately depicted when analyzing the system as a whole or when considering the forces acting on m1. However, when applying the same analysis to m2, the normal force becomes inaccurately represented, as the applied force only directly influences m1. This distinction is crucial for correctly interpreting the interactions between the two objects.

PREREQUISITES
  • Understanding of Free-Body Diagrams (FBD)
  • Knowledge of Newton's Laws of Motion
  • Familiarity with force vectors and their representations
  • Basic principles of normal force in physics
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Students of physics, educators teaching mechanics, and anyone involved in engineering or physical sciences who seeks to deepen their understanding of force interactions in multi-body systems.

LM06
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For the following scenario: http://i14.tinypic.com/6jnvi3p.gif
why is the Force vector coming from the left only represented only in two of the three separate cases you can take. That is, te Force vector can only be represented in the case where you are considering a the system as a whole and the forces acting on the first object m1. However, if you do this for object m2 you obtain an incorrect normal force.
 
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The applied force only acts on m1. Of course, it affects the normal force that m1 exerts on m2.
 

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