{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,20]],"date-time":"2025-12-20T22:09:57Z","timestamp":1766268597572,"version":"build-2065373602"},"reference-count":38,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2018,12,28]],"date-time":"2018-12-28T00:00:00Z","timestamp":1545955200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100006433","name":"Carleton College","doi-asserted-by":"publisher","award":["0000"],"award-info":[{"award-number":["0000"]}],"id":[{"id":"10.13039\/100006433","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>Physics students are rarely exposed to the style of thinking that goes into theoretical developments in physics until late in their education. In this work, we present an alternative to the traditional statement of Newton\u2019s second law that makes theory questions accessible to students early in their undergraduate studies. Rather than a contrived example, the model considered here arises from a popular framework for testing Lorentz symmetry used extensively in contemporary experiments. Hence, this work also provides an accessible introduction to some key ideas in ongoing tests of fundamental symmetries in physics.<\/jats:p>","DOI":"10.3390\/sym11010022","type":"journal-article","created":{"date-parts":[[2018,12,28]],"date-time":"2018-12-28T11:52:42Z","timestamp":1545997962000},"page":"22","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Spacetime Symmetries and Classical Mechanics"],"prefix":"10.3390","volume":"11","author":[{"given":"T. H.","family":"Bertschinger","sequence":"first","affiliation":[{"name":"Carleton College, One North College St., Northfield, MN 55057, USA"}]},{"given":"Natasha A.","family":"Flowers","sequence":"additional","affiliation":[{"name":"Carleton College, One North College St., Northfield, MN 55057, USA"}]},{"given":"Serena","family":"Moseley","sequence":"additional","affiliation":[{"name":"Carleton College, One North College St., Northfield, MN 55057, USA"}]},{"given":"Charlotte R.","family":"Pfeifer","sequence":"additional","affiliation":[{"name":"Carleton College, One North College St., Northfield, MN 55057, USA"}]},{"given":"Jay D.","family":"Tasson","sequence":"additional","affiliation":[{"name":"Carleton College, One North College St., Northfield, MN 55057, USA"}]},{"given":"Shun","family":"Yang","sequence":"additional","affiliation":[{"name":"Carleton College, One North College St., Northfield, MN 55057, USA"}]}],"member":"1968","published-online":{"date-parts":[[2018,12,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"116002","DOI":"10.1103\/PhysRevD.58.116002","article-title":"Lorentz-violating extension of the Standard Model","volume":"58","author":"Colladay","year":"1998","journal-title":"Phys. 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