Algebraic Operations on Energy-Momentum Relationships

Click For Summary
SUMMARY

The discussion centers on the algebraic manipulation of the energy-momentum relationship, specifically the equation $$E^2 - p^2 c^2 = \gamma^2m^2c^4(1 - \frac{v^2}{c^2})$$. Participants identified errors in the calculation, particularly the misuse of square roots after squaring terms. The correct interpretation leads to the conclusion that the expression in brackets simplifies to $$\frac{1}{\gamma^2}$$, clarifying the relationship between energy, momentum, and relativistic mass.

PREREQUISITES
  • Understanding of the energy-momentum relationship in physics
  • Familiarity with algebraic manipulation of equations
  • Knowledge of relativistic concepts such as gamma factor ($$\gamma$$)
  • Basic understanding of the speed of light ($$c$$) in physics
NEXT STEPS
  • Study the derivation of the energy-momentum relationship in special relativity
  • Learn about the gamma factor ($$\gamma$$) and its implications in relativistic physics
  • Explore algebraic techniques for manipulating complex equations
  • Investigate common pitfalls in algebraic calculations within physics
USEFUL FOR

Students of physics, educators teaching relativity, and anyone interested in mastering algebraic operations in the context of energy-momentum relationships.

alan123hk
Messages
817
Reaction score
450
This is just basic algebra for the energy-momentum relationship, but the calculations confuse me. May I ask what is wrong with my concept or calculation causing the following problem.

1654145948091.png

Maybe it's because I'm getting older, my ability to think and calculate has declined...
 
Last edited:
  • Wow
Likes   Reactions: Delta2
Physics news on Phys.org
Second line counting from the bottom - the square root should not be there since you raised it to the second power in the third line from the bottom.
 
Last edited:
  • Like
Likes   Reactions: alan123hk
weirdoguy said:
Third line counting from the bottom - the square root should not be there since you raised it to the second power.
My goodness!
got it, thanks.
 
  • Like
Likes   Reactions: weirdoguy
Simpler is
$$E^2 - p^2 c^2 = \gamma^2m^2c^4(1 - \frac{v^2}{c^2})$$And the result follows immediately as the expression in brackets equals ##\frac 1 {\gamma^2}##
 
  • Informative
Likes   Reactions: alan123hk

Similar threads

  • · Replies 30 ·
2
Replies
30
Views
2K
  • · Replies 23 ·
Replies
23
Views
3K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 17 ·
Replies
17
Views
4K
  • · Replies 138 ·
5
Replies
138
Views
8K
  • · Replies 28 ·
Replies
28
Views
3K
Replies
6
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 7 ·
Replies
7
Views
779