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Mass of earth and radius in physics with derivation and problems

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How to calculate the mass of earth?
diagram of mass of earth

Consider a body of mass m on the surface of the earth.Let the mass of the earth be  M and radius of the earth be R,The distance of the body from the center of the earth will also be equal to the radius R of the earth.According to the law of gravitation,the gravitational force F of the earth acting on a body is given by:derivation of mass of earth

  =6 × 1024 kg

Mass of earth in kg

Thus mass of the earth is 6 × 1024 kg. 

How radius of earth is calculated?

Radius of the earth can be calculated from the following formula:

 

Radius of earth in meters

Related topics:

ewton’s law of gravitation

Gravitation (force of gravity)

Gravitational field strength

 

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