Answer:
The
acceleration produced in the motion of a body falling under the force of gravity
is called acceleration due to gravity. It is denoted by 'g'.
The force (F)
of gravitational attraction on a body of mass m due to earth of mass M and
radius R is given by
We know from
Newton's second law of motion that the force is the product of mass and
acceleration.
But the
acceleration due to gravity is represented by the symbol g-. Therefore, we can
write
F=mg
...(2)
From the
equation (1) and (2), we get
or ?. (3)
When body is
at a distance 'r' from centre of the earth then
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