# ثابت الجاذبية

This page is a translated version of the page Dictionary:Gravitational constant and the translation is 33% complete.

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ثابت تناسبي γ في قانون نيوتن للجاذبية الكونية. يمكن أن ترتبط قوة الجاذبية F بين نقطتين للكتلة m1 و m2 بالمسافة r بينهما:

${\displaystyle F={\frac {\gamma m_{1}m_{2}}{r^{2}}}}$

${\displaystyle \gamma }$ has the value ${\displaystyle 6.67\times 10^{-11}N\cdot m^{2}/kg^{2}}$. The force is a vector directed toward the attracting mass. The gravitational field g (also a vector, often called the acceleration of gravity) is the force per unit mass (measured by the force on the mass m1 in the gravimeter):

${\displaystyle g={\frac {F}{m_{1}}}={\frac {\gamma m_{2}}{r^{2}}}}$;

g is the vector sum of the effect of all the masses (e.g., the masses in the Earth).