Question

What is the magnitude of the gravitational force between the Earth and a 1kg object on its surface ? (Mass of the earth is `6xx10^(24)` kg and radius of the Earth is `6.4xx10^(6) m)`.

Answer 1

`F=?,m=1kg,M=6xx10^(24)kg R=6.4xx10^(6)m, G=6.67xx10^(-11) Nm^(2)//kg^(2)`
As `F=(GMm)/(R^(2)), F=((6.67xx10^(-11))xx6xx10^(24)xx1)/(6.4xx10^(6))^(2)=9.8N`