Understanding the reasoning of this answer

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SUMMARY

This discussion emphasizes the importance of providing complete and clear problem statements when seeking assistance in relativistic calculations. The mention of variables such as ##\gamma## and ##\sigma## highlights the need for clarity in definitions to avoid confusion. The responder stresses that without context or a full explanation of terms, effective help cannot be provided. This underscores the necessity for thorough communication in technical discussions.

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  • Understanding of relativistic physics concepts, specifically Lorentz factor (##\gamma##).
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Abhishek11235
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Homework Statement
This is exercise from Morin's book of classical mechanics(Q-12.14 in screenshot 2). He asks to calculate force in 2 different frames. I got the answer and it matches with the solution provided(Screenshot 3). However,the forces in 2 frames must be equal since longitudinal components of force are same. Morin provides explanation for this paradox which completely goes over my understanding(Screenshot 1). Can anybody help me in understanding the reasoning of paradox?
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Please be more considerate when seeking assistance. It would help us help you if you posted the actual statement of the problem, not your synopsis of it. For example, although I can guess that it involves a relativistic calculation and I understand what ##\gamma## stands for, I have no idea what ##\sigma## is all about and I don't want to guess how it is defined. It would also help to show the "above" as in "##\dots##we have seen above that it is ## \gamma^2 \sigma v ...##"
 
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