" Earth's gravitational acceleration "

Earth's gravitational force

The ratio of the height above the surface of earth to the depth below, the surface of earth, for gravitational accelerations to be the same (assuming small heights) is

The kinetic energy needed to project a body of mass m from the earth's surface to infinity is (R is radius of the earth, g is gravitational acceleration on the surface of the earth)

Statement-1: The acceleration of a particle near the earth surface differs slightly from the gravitational acceleration Statement-2: The earth is not a uniform sphere and because the earth rotates.