Is Length Invariant Under Galilean Transformations?

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SUMMARY

The discussion focuses on demonstrating that the length of a bar remains invariant under Galilean transformations, specifically in the context of frames S and S’. The key equation used is x' = x - vt, where t' = t, y' = y, and z' = z. The participants clarify that while the spatial coordinates change, the physical length measured in both frames remains constant. This conclusion is essential for understanding classical mechanics and the implications of Galilean relativity.

PREREQUISITES
  • Understanding of Galilean transformations
  • Familiarity with basic kinematics
  • Knowledge of reference frames in physics
  • Ability to manipulate algebraic equations
NEXT STEPS
  • Study the principles of Galilean relativity in detail
  • Explore the implications of length contraction in special relativity
  • Learn about the differences between Galilean and Lorentz transformations
  • Examine practical applications of Galilean transformations in physics problems
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This discussion is beneficial for physics students, educators, and anyone interested in classical mechanics and the foundational concepts of relativity.

hatachiclaud
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Homework Statement



Consider a bar of length as measured in frame S. Show that the bar has the same length in
frame S’, that is, show that lengths are invariant under Galilean transformations.

Homework Equations


x'=x-vt


The Attempt at a Solution



I know that t'=t
y'=y
z'=z
so

x'=x-vt


The problem is that i don't understant how to make it valit with the equation, i undestant that the space from th point of view of S' dilates and is not invariant .
 
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Last edited by a moderator:
Yep but how i show that the leght in that equation is invariant in galilean tranformation
 

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