The equation to calculate the gravitational force acting on a boob (or any object) is F = mg where:
F: is the gravitational force in Newtons
m: is the mass of the boob (in kilograms)
g: is the acceleration due to gravity, approximately 9.8 m/sΒ²
To calculate the mass of the boob, you need to know its volume and the density of water (approximately 1000 kg/mΒ³).
This equation applies to any object, not just a boob, as long as you know its mass.
The concept of skin elasticity in relation to gravity can be understood through the idea of stress and strain, where the force of gravity acts as a constant downward stress on the skin, leading to increased strain (deformation) as skin loses its natural elasticity due to aging and reduced collagen/elastin production, causing sagging.
Skin elasticity is primarily determined by the presence of collagen and elastin fibers, which act like tiny springs to resist deformation.
Gravity exerts a continuous downward force on the skin, particularly on facial features, causing it to stretch and sag over time if its elasticity is compromised.
Besides gravity, other factors like sun exposure, genetics, hydration levels, and age can also significantly impact skin elasticity.
In biomechanical terms, the skin can be visualized as a material with a stress-strain curve, where the "stress" is the force of gravity and the "strain" is the deformation of the skin due to that force.
As skin loses elasticity with age, its ability to resist deformation decreases, meaning even a small gravitational force can cause noticeable sagging.