Question

Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.
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Answer 1

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Solution:

Consider F is the force of attraction between an object on the surface of earth and earth.

Also consider ‘m’ is the mass of the object on the surface of earth and ‘Me’ is the mass of earth.

Therefore the formula for magnitude of the gravitational force between the earth

Answer 2

Answer:

1. Let the mass of earth = M.

2. Let the mass of the object = m.

3. Distance between the the earth's centre and object = Radius of the earth = R.

4. Therefore,

5. Gravitational Force = F = GMm/ R 2