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The gravitational constant, approximately 6989667400000000000â 6.674Ã10â11 Nâm2/kg2 and denoted by letter G, is an empirical physical constant involved in the calculation(s) of gravitational force between two bodies.
Fg=mg=W. Force of gravity on an object is the product of the mass and gravity, which is its weight. F=kx. Hooke's law: The extension of a spring (x) is proportional to the load placed on the spring (F), until it reaches the limit of proportionality. K is the spring constant; it is in N/m or N/cm. It is a number that describes how hard it is to stretch the spring. (F in N, K in N/cm or N/m, x in cm or m)