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## Answers

Solution:

Consider a body of mass = m

According to the law of Gravitation ,

F =GMm/r² ,,,,,,,,,,,,,, (1)

Where F is the force of attraction between the body of mass m and the earth.

G= universal Gravitational Constant

r = distance between the center of masses.

Also ,

we know that earth attracts a body with a force given by

F=mg .......(2)

from 1 and 2 , we gt

mg = GMm/r²

or

**g =GM/r²**

Hope this helps You!!!