173.206.33.141

September 2020

Hello, I'm DVdm. I noticed that you added or changed content in an article, Elastic collision, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at the tutorial on citing sources. If you think I made a mistake, you can leave me a message on my talk page. Thank you. - DVdm (talk) 09:20, 2 September 2020 (UTC)

Hi DVdm,

Re: Full revert of an edit (derivation of a physics formula) in Elastic collision article due to lack of citation

Thank you for the notice of lack of citation. The derivation is elementary, so it does not require a source & its validity can be verified easily. Nevertheless, citation has been added.

However, my edit should have remained but been tagged for citation. It is not appreciable that the edit was reverted in its entirety, which is disproportionate and is demotivating in participating further in Wikipedia. But, I really do appreciate that you reached out directly on my talk page, which I wish established editors would engage in more.

FYI, I may be adding to that article further re: Body assumptions; Programming; Ideal & non-ideal classical mechanics; Statistical mechanics. Will keep in mind citations and will appreciate discussion before full reverts.

Thank you,

173.206.33.141 (talk) 19:17, 2 September 2020 (UTC)

Regarding your remark that "the derivation is elementary, so it does not require a source", please note that all challenged content requires a citation—see wp:BURDEN. Yes, there is an exception for simple routine calculations (—see wp:CALC—), but your content is way betond that. Please keep that in mind in the future.

As I have no access to the source that you provided when you undid my revert, I have put an informal request for comment on the physics project page Wikipedia talk:WikiProject Physics#Large addition at Elastic collision. Feel free to comment there. By the way, there is no need to also notify me on my talk page, as I have yours on my watch list. - DVdm (talk) 19:44, 2 September 2020 (UTC)

Sandbox, pls ignore

Sandbox. Pls ignore. - 173.206.33.141 (talk) 22:47, 5 September 2020 (UTC)

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