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Johnnyboy
Johnnyboy asked in Science & MathematicsPhysics · 1 decade ago

The universal gravitational constant, G?

Here is the equation when the constant of proportionality called the universal gravitational constant,

G=6.67*10^11 N m^2/kg^2

How do you calculate the force of gravity between the earth (mass=6 * 10^24kg) and the sun (mass= 2*10^30kg,

distance= 1.5*10^11m).

4 Answers

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  • John W
    1 decade ago
    Favorite Answer

    The force due to gravity between two objects is directly proportional to the two masses in question, and inversely proportional to the square of the distance between them.

    thus,

    F = (GMm)/r^2

    G is actually 6.7 x 10^-11 m^3/(kg*s^2).

    Plugging in values we obtain

    F = ((6.67*10^-11 N m^3/(kg*s^2))(6 * 10^24kg)(2*10^30kg))/(1.5*10^11m)^2

    F = 3.559x10^22 N

  • eric l
    Lv 6
    1 decade ago

    Gravitational Force= ((mass earth) (Mass sun) G)/ distance^2

    Source(s): http://en.wikipedia.org/wiki/Newtonian_physics
  •     
    Lv 7
    1 decade ago

    Fg = (GMm) / r^2

    Fg = (6.67 x 10^ -11) (2 x 10^30 ) (6 x 10^24 )

    .......---------------------------- -----------------------

    ............. ............. (1.5 x 10^11)^2

    Fg = 3.58 x 10^66 N

  • SS4
    Lv 7
    1 decade ago

    F = -mMG/r^2

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