| http://www.w3.org/ns/prov#value | - G is a constant, but the force of attraction is not constant. the force is proportional to the product of the two masses and inversely proportional to the square of the distance between masses. the difference in gravity is due to the varying amounts of mass (which may include a height differnece) between your feet and the centre of the earth at various locations around the globe ie assuming identi
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