“嫦娥一号”于2009年3月1日下午4时13分成功撞月,从发射到撞落历时

嫦娥一号200931日下午413分成功撞月,从发射到撞落历时433天,标志着我国一期探月工程的圆满结束.其中,卫星发射过程先在近地圆轨道绕行3周,再长途跋涉进入近月圆轨道绕月飞行.若月球表面的重力加速度为地球表面重力加速度的,月球半径为地球半径的,据以上信息得:

(1)绕月与绕地飞行周期之比为________

(2)绕月与绕地飞行向心加速度之比为________

(3)月球与地球质量之比为________

答案

(1)2 (2)16 (3)196

【解析】卫星在绕月和绕地飞行时,都是星体表面的重力提供了卫星运动的向心力,GmgmamR,故可得TagMgR2,即TT2aa16MM196.

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