User talk:74.89.136.220

October 2018
Please refrain from making unconstructive edits to Wikipedia, as you did at Potential energy. Your edits appear to constitute vandalism and have been reverted. If you would like to experiment, please use the sandbox. Repeated vandalism may result in the loss of editing privileges. Thank you. Jasper Deng (talk) 23:59, 23 October 2018 (UTC)
 * If this is a shared IP address, and you did not make the edits, consider creating an account for yourself or logging in with an existing account so you can avoid further irrelevant notices.