# Question #f3cca

Mar 26, 2016

Center of gravity is defined as the point in an object around which the resultant torque due to gravity is zero.
Acceleration due to gravity, is the acceleration of a falling body due to the earth's gravitational field.

#### Explanation:

Center of gravity is defined as the point in an object around which the resultant torque due to gravity is zero.

Acceleration due to gravity, is the acceleration of a falling body due to the earth's gravitational field.

It is inversely proportional to the square of the distance of the body from the center of earth. Also called gravity and denoted as $g$. It is approximately equal to $9.81 m {s}^{-} 2$. It is given by the expression

$g = \frac{G {M}_{e}}{R} _ {e}^{2}$
where $G$ is the Gravitational constant, ${M}_{e}$ is mass of earth and ${R}_{e}$ the average radius of earth.

Its measured value varies slightly with the latitude and longitude of the location of measurement.