Exploring Kinetic Energy & Recessional Velocity

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SUMMARY

The discussion centers on the application of kinetic energy in relation to recessional velocity due to the universe's expansion. Participants assert that kinetic energy is frame-dependent, meaning it varies based on the observer's reference point. The conversation highlights the complexities of measuring kinetic energy for objects, such as stars, that appear to move faster than light from certain perspectives. Ultimately, the consensus is that kinetic energy remains a local phenomenon, influenced by the observer's frame of reference.

PREREQUISITES
  • Understanding of kinetic energy principles
  • Familiarity with recessional velocity in cosmology
  • Knowledge of reference frames in physics
  • Basic concepts of special relativity
NEXT STEPS
  • Research the implications of special relativity on kinetic energy
  • Study the concept of recessional velocity in the context of cosmology
  • Explore the effects of different reference frames on physical measurements
  • Investigate the theoretical limits of speed, including objects exceeding light speed
USEFUL FOR

Physicists, cosmologists, and students studying advanced mechanics who are interested in the relationship between kinetic energy and the expansion of the universe.

zeromodz
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Can you apply kinetic energy to an object using its recessional velocity from the expansion of the universe?I don't think so because then the kinetic energy would be relative to whatever you compare it to, what do you think?
 
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No. Kinetic energy would be different for every different frame of reference.
Then there's the problem of the kinetic energy of stars moving at greater than lightspeed as seen from here.
 


Kinetic energy, like politics, is always local.
 

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