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Explain about the centre of mass of eart...

Explain about the centre of mass of earth moon system and its rotation around the sun.

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The interaction of earth and moon does not effect the motion of centre of mass of earth and moon system around the sun. The gravitational force between earth and moon is internal force. Internal forces cannot change the position of centre of mass. The external force acting on the centre of mass of earth and moon system is force between the sun and C.M. of earth, moon system. Motion of centre of mass depends on 'external force. Hence, earth moon system continues to move in an elliptical path around the sun. It is irrespective of rotation of moon around earth.
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Knowledge Check

  • The path of the centre of mass of earth - moon system around the sun is

    A
    Circular path
    B
    Helical path
    C
    Parabolic path
    D
    Elliptical path

  • The path of the centre of mass of earth-moon system around the sun is

    A
    Circular path
    B
    Helical path
    C
    Parabolic path
    D
    Elliptical path

  • The path of the centre of mass of earth - moon system around the sun is

    A
    Circular path
    B
    Helical path
    C
    Parabolic path
    D
    Elliptical path

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