The Gravitational Force Between Two Masses Is Modeled Using the Following

Multiple Choice

The gravitational force between two masses is modeled using the following function: $F _ { g } ( r ) = G \frac { m _ { 1 } m _ { 2 } } { r ^ { 2 } }$
where $F _ { g } =$ gravitational force (Newtons)
$\begin{array} { l } G = 6.673 \times 10 ^ { - 11 } \frac { \mathrm { N } \cdot \mathrm { m } ^ { 2 } } { \mathrm {~kg} ^ { 2 } } \\m _ { 1 } = \text { mass number } 1 \text { (kilograms) }\end{array}$ $m _ { 2 } = \text { mass number } 2 \text { (kilograms) }$
$r =$ distance between centers of masses (meters) Which type of mathematical model is used here to describe the gravitational force?

A) Linear model
B) Nonlinear model
C) Exponential model
D) Trigonometric model