如果地球是均匀球体那上面一物体所受弹力过球心吧,?那重力也过球心?引力也过球心,�心力怎么分解出来的? 知乎 Template




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tomski如果地球是均匀球体那上面一物体所受弹力过球心吧,?那重力也过球心?引力也过球心,�心力怎么分解出来的? 知乎 coloring