Differential vector aspect of area space A, with infinitesimally small magnitude and course typical to floor S square meter (m2) Round movement and centripetal acceleration: Centripetal pressure and gravitationCentripetal forces: Centripetal power and gravitationNewton's law of gravitation: Centripetal pressure and gravitation 高中: 數學(中)，數學(英)，生物(中)，生物(英)，化學(中)，化... http://wardb580hmq0.webbuzzfeed.com/profile