Stays lined up with North Star
No force contributes to density, the density is a physical quantity that is defined as being

the raport between the mass of the object and its volume. However if you want to measure the density of an object you might want to determine its gravity force (weight)

from which knowing the gravitational acceleratin you can find its mass
where

is given in Newtons and

is given in
Needs are less than resources, and the population increases.
Mechanical advantage is the ratio of output force to input force of a machine.
hope this helps and have a great day :)