.The value of ‘g’ changes from place to place on the earth, &  is greater in the poles and lesser in the

The value of 'g', which represents the acceleration due to gravity, does indeed vary across the Earth. This is due to several factors:

1. Shape of the Earth: The Earth is not a perfect sphere, but an oblate spheroid, meaning it is slightly flattened at the poles and bulging at the equator. As a result, objects are closer to the Earth's center of mass at the poles than at the equator, which increases the gravitational pull they experience.

2. Rotation of the Earth: The Earth's rotation causes a centrifugal force that counteracts the force of gravity. This force is stronger at the equator than at the poles, due to the larger radius of rotation. This further reduces the effective gravity at the equator.

3. Altitude: The further an object is from the Earth's center of mass, the weaker the gravitational pull it experiences. Therefore, objects at higher altitudes experience slightly less gravity.

4. Local geological variations: The density and type of rock beneath the Earth's surface can also affect the local gravitational field slightly.

So, in summary, the value of 'g' is greater at the poles and lesser at the equator due to the shape and rotation of the Earth, as well as altitude and local geological variations.