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March 25, 2017

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Hi! I am struggling with this problem-- any help would be much appreciated--
thank you

astronauts on their way to the moon reach a point --> at this point, the moon's gravitational pull becomes stronger than the earth's gravitational pull-----find the distance between this point and the center of the EARTH

  • ap physics c - ,

    Equate the gravitational pulls from the earth and the moon.

    Let
    D=distance between the centres of the earth and the moon.
    x=distance of the equality point from the centre of the earth.
    M=mass of the earth
    m=mass of the moon

    Then
    GM/x² = Gm/(D-x)²
    Solve for x in terms of D, M and m.

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