Question
According to Newton’s law of gravitation everybody in this universe attracts every other body. But we do not see bodies on the surface of the earth moving towards one another on account of this interaction. Why?
Solution
According to Newton’s law of gravitation,
The value of G = 6.67x10-11 Nm2/kg2.
The masses of two ordinary bodies on the surface of the earth is small i.e. of the order of 102 kg.
Therefore, the force of attraction between two bodies, each of mass 100 kg separated by 1m, is of the order of 10-6N which is too small to overcome the force of friction between the body and the surface.
That is why we do not see the bodies on the surface of the earth moving towards each other.
The value of G = 6.67x10-11 Nm2/kg2.
The masses of two ordinary bodies on the surface of the earth is small i.e. of the order of 102 kg.
Therefore, the force of attraction between two bodies, each of mass 100 kg separated by 1m, is of the order of 10-6N which is too small to overcome the force of friction between the body and the surface.
That is why we do not see the bodies on the surface of the earth moving towards each other.
