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Given G = 6 6 7 x 1 0 − 1 1 N m − 2 / k g 2 To determine the value of G s (GS system formula used) n 2 = n 1 M 2 M 1 a L 2 L 1 b T 2 T 1 c The dimensional formula of G = M − 1 L 3 T − 2 ∴ a = − 1, b = 3, c = − 2 Suppose, n 2 dyne c m 2 g − 2 = 6 6 7 x 1 0 − 1 1 N m 2 k g − 2 ∴ n 1 = 6 6 7 × 1 0 − 1 1 Therefore, n 2 = 6 6 7 × 1 0 − 1 1 g k g − 1 c m m 3 s s − 1• Gravitational potential energy • Satellites rd• Kepler's 3 Law • Escape speed Newton's Law of Gravitation A force of attraction occurs between two masses given by A value for G, the universal gravitational constant, can be obtained from measurements by Henry Cavendish (1731 – 1810) of the specific gravity of the Earth · Universal Gravitation Constant (G) The universal gravitation constant (G) is a very small number 667 x 1011 Nm/kg 2 and not the 10 m/s 2 (g) for the acceleration due to gravity when objects are on earth Universal gravity is the weakest of the fundamental forces in the universe The Earth and the Sun both h