What is the newton's law of universal gravitation?

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What is the newton's law of universal gravitation?

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Answer 1 · 2014-12-20T16:58:56

All objects in the universe attract each other in proportion to the product of their masses and inversely proportional to the distance between them.

Two objects of mass $m_{1}$ $m_1$ and $m_{2}$ $m_2$ separated by a distance $r$ $r$ will attract each other with a force $F$ $F$ as described by this equation:

$F = G \frac{m_{1} m_{2}}{r^{2}}$ $F = G(m_1m_2)/r^2$

Where G is the universal gravitational constant.

$6.673 \times 10^{- 11} N \frac{m^{2}}{{(k g)}^{2}}$ $6.673×10^(−11) N m^2/(kg)^2$

Gravity is the weakest of the four known forces. The other forces are the Electromagnetic Force, the Strong Nuclear Force, and the Weak Nuclear Force.

[Also see this Wikipedia page.](http://en.wikipedia.org/wiki/Newton%27s_law_of_universal_gravitation)

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What is the newton's law of universal gravitation?

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