A 90 kg body placed at 2 R distance from surface of earth experiences gravitational pull of : ( R = Radius of earth, g = 10 m s − 2 )

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Here g s ​ = gravitational acceleration at surface ​ Value of g = g 5 ​ ( 1 + R h ​ ) − 2 = g 5 ​ ( 1 + 2 ) − 2 = 9 g 5 ​ ​ ​ Force = mg = 90 × 9 g 5 ​ ​ = 100 N

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