Weightlessness

Weightlessness, or an absence of 'weight', is an absence of stress and strain resulting from externally applied mechanical contact-forces, typically normal forces from floors, seats, beds, scales, and the like. Counterintuitively, a uniform gravitational field does not by itself cause stress or strain, and a body in free fall in such an environment experiences no g-force acceleration and feels weightless. This is also termed "zero-g" where the term is more correctly understood as meaning "zero g-force."

When bodies are acted upon by non-gravitational forces, as in a centrifuge, a rotating space station, or within a space ship with rockets firing, a sensation of weight is produced, as the contact forces from the moving structure act to overcome the body's inertia. In such cases, a sensation of weight, in the sense of a state of stress can occur, even if the gravitational field was zero. In such cases, g-forces are felt, and bodies are not weightless.

When the gravitational field is non-uniform, a body in free fall suffers tidal effects and is not stress-free. Near a black hole, such tidal effects can be very strong. In the case of the Earth, the effects are minor, especially on objects of relatively small dimension (such as the human body or a spacecraft) and the overall sensation of weightlessness in these cases is preserved. This condition is known as microgravity and it prevails in orbiting spacecraft.

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Long way home

by: Idle Sons

Break yourself
Down again
This is your only ploy
to make it up
You come back around
Now you will only
Break my bones
then come back again
It's overexposure
Create control
Listen up
Shut your mouth
this is my only ploy
I"m taking back
All that once was mine
Now you will never
Break my bones
then come back again
It's over exposure
Create control
On your own again
It's over
Break my bones
then come back again
It's over exposure
Create control
Such a long way home
It's such a long way home again
It's such a long way home
This the last time you will ever see my face




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