obtain the SI unit of gravitational constant G from the expression for gravitational force between two object
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Answer:
Nm2/kg2 (newton metre squared per kilogram squared)
Explanation:
From Newton's universal law of gravitation,
F=(G×m1×m2)/d2
where F = gravitational force
G = universal gravitational constant
m1 = mass of the first object
m2 = mass of the second object
d = distance between the objects
Hence, universal gravitational constant, G=(F×d2)/(m1×m2)
Unit of F = newton (N)
Unit of d = metre (m)
Unit of m1 = Unit of m2 = kilogram (kg)
Hence, unit of G = Nm2/kg2 (newton metre squared per kilogram squared).
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