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Find the dimension of gravitational constant ¿¿¿ |
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Answer» The dimensional formula of gravitational CONSTANT is given by, M-1 L3 T-2 Where, M = Mass L = Length T = Time DerivationFrom NEWTON’s law of gravitation, FORCE (F) = [GmM] × r-2 Gravitational Constant (G) = F × r2 × [Mm]-1 . . . . (1) Since, Force (F) = Mass × Acceleration = M × [LT-2] ∴ The dimensional formula of force = M1 L1 T-2 . . . . (2) On substituting equation (2) in equation (1) we get, Gravitational Constant (G) = F × r2 × [Mm]-1 Or, G = [M1 L1 T-2] × [L]2 × [M]-2 = [M-1 L3 T-2]. Therefore, the gravitational constant is dimensionally represented as M-1 L3 T-2. |
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