Gravitational Field Strength

The formula for calculating the gravitational force between two objects is $F = \frac{{G \cdot m_1 \cdot m_2}}{{r^2}}$, where $F$ is the gravitational force, $G$ is the gravitational constant, $m_1$ and $m_2$ are the masses of the two objects, and $r$ is the distance between the centers of the two objects.

The formula for calculating the net force acted on an object is $F_{net} = m \cdot a$, where $F_{net}$ is the net force, $m$ is the mass of the object, and $a$ is the acceleration.

Gravitational acceleration, denoted by $g$, is the acceleration due to gravity. On Earth, it is approximately 9.8 m/s^2.

The gravitational field strength, denoted by $g$, is the force per unit mass experienced by a test mass placed in the gravitational field. It is equal to the gravitational acceleration.

The gravitational field strength at the center of the Earth can be calculated by using the formula $g = \frac{{G \cdot M}}{{R^2}}$, where $g$ is the gravitational field strength, $G$ is the gravitational constant, $M$ is the mass of the Earth, and $R$ is the radius of the Earth.