a similar #JavaScript version
http://iwant2study.org/ospsg/index.php/interactive-resources/physics/02-newtonian-mechanics/05-circle/363-circularmotionwee02#faqnoanchor
[img]https://3.bp.blogspot.com/-of2v3nUduqc/Vw8qhIRHZzI/AAAAAAAA3ZE/eef9MR4Cj7UnDq5ioJEgIRz44UZ9hmfAQCLcB/s640/2016-04-14_1326.png[/img]