College Physics ›› 2017, Vol. 36 ›› Issue (2): 8-10.doi: 10.16854 /j.cnki.1000-0712.2017.02.003

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The fourth cosmic speed of the Moon

YU Feng-jun   

  1. College of Physics and Electrical Engineering,Anyang Normal University,Anyang,Henan 455000,China
  • Received:2016-02-17 Revised:2016-04-15 Online:2017-02-20 Published:2017-02-20

Abstract: The minimum speed,required for an object escaping from the gravity of the solar system launched from the lunar surface,is calculated. The result is 11.6 km/s,its direction is along the one of the full moon’s orbital motion.

Key words: cosmic speed, rocket, solar system, gravity, conservation of mechanical energy