Does Special Relativity Affect Mass?

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SUMMARY

The discussion clarifies that mass is not relative and does not change with speed, countering the outdated concept of "relativistic mass." The equation E = γmc², where γ (gamma) represents the Lorentz factor, is referenced to explain energy calculations at high speeds. The speed of light remains constant, and even at speeds approaching light, an observer does not experience an increase in mass. This conclusion is supported by modern physics principles and the understanding of mass-energy equivalence.

PREREQUISITES
  • Understanding of Einstein's mass-energy equivalence principle (E = mc²)
  • Familiarity with the Lorentz factor (γ) in special relativity
  • Basic knowledge of the speed of light as a universal constant
  • Awareness of the historical context of "relativistic mass"
NEXT STEPS
  • Study the implications of the Lorentz factor (γ) in high-speed physics
  • Explore the concept of invariant mass versus relativistic mass
  • Investigate the effects of special relativity on time dilation and length contraction
  • Learn about modern interpretations of mass in quantum physics
USEFUL FOR

Students of physics, educators teaching special relativity, and anyone interested in the fundamental principles of mass and energy in the context of modern physics.

The_Baron
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Is mass relative? does the faster you go change your mass? Because according to the Energy calculations E = ymc^2 at speed and mc^2 and since the speed of light is constant, does that mean that mass changes?

[Thread edited by a Mentor to remove personal speculation]
 
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The_Baron said:
Is mass relative? does the faster you go change your mass? Because according to the Energy calculations E = ymc^2 at speed and mc^2 and since the speed of light is constant, does that mean that mass changes?
No. You are thinking of the LONG deprecated concept of "relativistic mass". You, right now as you read this, are traveling at very close to the speed of light (relative to a particle in the CERN accelerator). Did knowing that make you feel more massive?
 
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