Declarations

TL;DR This question is not homework, and this question doesn't ask for "check-my-work". If you don't want to see the equations, just ignore them.

"Homework-like" and "check-my-work" rules are ambiguous. Some questions were closed because they provided more details which made the question like "check-my-work". The rules should be based on the intention of the question, not the answer.

1. I listed my steps because I wanted to provide more details for people trying to answer me. I didn't want anyone to check my work. If you feel the equations are annoying, just skip them.
2. This question is not my homework. I tagged this question as homework just to prevent it be closed due to "homework-like" and "check-my-work" policies.
3. This question is asking about concepts. I didn't know if there is any error in my equations (proof) before I receive a robust answer.
4. Please don't ban me. I read through Homework-like questions and I know they should ask about a specific physics concept and show some effort to work through the problem.

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