The value of acceleration due to gravity of earth at the equator is less than that of the poles due to _____*1 pointShape and rotation of the earthMass of the sunMass of the earthMass of the moon

The value of acceleration due to gravity of earth at the equator is less than that of the poles due to the shape and rotation of the earth.

Here's why:

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. Because of this shape, the poles are closer to the Earth's center than the equator is. Since gravitational force depends on the distance between two objects, gravity is stronger the closer objects are to each other. Therefore, gravity is stronger at the poles than at the equator.

2. Rotation of the Earth: The Earth's rotation causes a centrifugal force that pushes objects away from the center of rotation. This force is stronger at the equator, where the speed of rotation is greatest, and it slightly counteracts the force of gravity. As a result, the effective gravity at the equator is slightly weaker than at the poles.

The mass of the sun, earth, and moon do affect the earth's gravity, but they do not cause the difference in gravity between the equator and the poles.