Interpreting the L2 Norm of Force on a Path

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SUMMARY

The discussion focuses on the physical interpretation of the L2 norm of force along a path, specifically represented by the integral of the force squared, expressed mathematically as \(\left(\int_\Gamma F \cdot F \right)^{\frac{1}{2}}\). It establishes that the path integral of force corresponds to work, which has a clear physical meaning. The conversation also explores the analogy between minimizing work and minimizing the L2 norm of force along a path, questioning how to characterize paths that achieve this minimization. The mathematical representation of force as a vector function \(F:R^3 \to R^3\) is confirmed.

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  • Understanding of vector calculus, particularly path integrals
  • Familiarity with the concept of work in physics
  • Knowledge of L2 norms and their applications in physics
  • Basic understanding of vector fields and their properties
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Physicists, mathematicians, and engineers interested in the mathematical foundations of mechanics and optimization of physical paths. This discussion is particularly beneficial for those studying force dynamics and energy minimization in physical systems.

maze
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The path integral of force is the work, something that has a clear physical meaning we can relate to. My question is, what is the physical interpretation for the L2 norm of the force along a path? (integral of the force squared, basically):

\left(\int_\Gamma F \cdot F \right)^{\frac{1}{2}}

If a particle takes the path from point A to B which minimizes the work, then the least amount of external energy was expended moving it from point A to B. Can we analogously characterize the type of paths between 2 points that minimize the L2 norm of the force.

Thanks!
 
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maze said:
The path integral of force is the work, something that has a clear physical meaning we can relate to. My question is, what is the physical interpretation for the L2 norm of the force along a path? (integral of the force squared, basically):

\left(\int_\Gamma F \cdot F \right)^{\frac{1}{2}}

Do you mean:

\left(\int_\Gamma (\mathbf{F} \cdot \mathbf{F})ds \right)^{\frac{1}{2}}

?
 
Yes, of course. F:R3->R3, \Gamma:[0,1]->\textbf{R}^3
 

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