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Universal law of universal gravitation

Describe the universal law of universal gravitation? Briefly describe it.

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The statement that any particles of matter in globe attract any other with the force varying directly as the product of masses and inversely as the square of distance among them. In symbols, the magnitude of attractive force F is equivalent to G (that is, the gravitational constant, a number, the size of which mainly depends on the system of units employed and which is a universal.   

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