{"repository":{"description":"A realistic mass and spring laboratory. Hang masses from springs and adjust the spring stiffness and damping. You can even slow time. Transport the lab to different planets. A chart shows the kinetic, potential, and thermal energy for each spring.","watchers":0,"stargazers":0,"forks":0,"fork":false,"size":1320,"owner":"phetsims","private":false,"open_issues":0,"has_issues":true,"has_downloads":true,"has_wiki":true,"language":"JavaScript","created_at":"2013-02-07T20:27:21-08:00","pushed_at":"2013-02-16T22:10:16-08:00","master_branch":"master"},"actor_attributes":{"type":"User","email":"da39a3ee5e6b4b0d3255bfef95601890afd80709"},"url":"https://github.com/phetsims/masses-and-springs/compare/865fbb9747...3d88f368d9"}