10.2.1 TO CALCULATE THE VALUE OF 9 To calculate the value of g, we should put
the values of G, M and R in Eq. (10.9),
namely, universal gravitational constant,
G = 6.7 x 10-11 N m2 kg-2, mass of the earth,
M = 6 x 1024 kg, and radius of the earth,
R= 6.4 x 106 m.
M
9 = G
R?
6.7x10'll N m² kg 2 x6x1024 kg
(6.4x10 m)?
= 9.8 m s-2.
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