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what does the law of universal gravitation explain. Newtons law of gravitation every mass attracts every other mass with a force proportional to the product of their masses inversely proportional to the square of the distance between them and with direction along the line connecting the center of mass of each universal gravitational constant. Explain what is universal about the law of universal gravitation.
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According to Newtons second law a Fm. Gravity is what pulls us toward Earth but its also what pulls Earth toward us. Consider an object that is free to accelerate and is acted on only by gravitational force.
While in the case of coulombs law we define k for a particular value and then determine q by applying coulombs law.
Unlike the attraction of the Earth which has a huge mass M such a force is quite small and the number G is likewise very very small. F gravity GM 1M 2 R2 F gravity G M 1 M 2 R 2 The force of gravity is what gives us our sense of weight. More on Newtons Law of Universal Gravitation. That is the number we need to know in order to calculate the gravitational attraction between say two spheres of 1 kilogram each.
