User talk:189.252.157.78

March 2016
Hello, I'm FoCuSandLeArN. I wanted to let you know that one or more of your recent contributions to Drag (physics) has been undone because it did not appear constructive. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. FoCuS contribs ;  talk to me!  22:10, 14 March 2016 (UTC)
 * If this is a shared IP address, and you did not make the edits, consider creating an account for yourself so you can avoid further irrelevant notices.