d

3. At the equator the
earth is bulged out
a little compared to
that in polar region
.

4. The distance from the centre of the earth to the equator will
be greater than the distance from the centre to the poles.
.

6. When the height of the
object from the earth
increases, the force of
attraction of the earth on
an object increases

7. According to
Newton's
second law of
motion , when
the force is
applied on an
object there will
be an
acceleration on
the object.

8. Hence the effective force of
attraction on it will be zero

9. Acceleration due to gravity when the earth exerts a
force on the object , the acceleration experienced
by the object is the acceleration due to gravity