Center of gravity: the single point in an object that gravity pulls on.
Compression: a force that presses or pushes towards an object’s center.
Ergonomics: the practice of designing objects that conform to the dimensions of the human body to maximize comfort.
Load: weight that is carried by an object.
Strut: a brace or support.
Sway: to move back and forth.
Truss: a triangular support.