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What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? (Mass of the earth is kg and radius of the earth is m.)
According to the Universal law of gravitation, the force of attraction between two bodies is given by:
= mass of Earth = kg
= mass of the body = 1 kg
= Universal gravitational constant =
= distance between the two bodies
Radius of Earth, = m
By substituting all the values in the equation
This shows that Earth exerts a force of 9.8 N on a body of mass 1 kg. The body will exert an equal force of attraction of 9.8 N on the Earth.
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