To ensure a body does not move translationally or rotate, two conditions must be met simultaneously:
If displaced slightly, the body returns to its original position (the center of gravity rises). fizika 10 miakishev konspekt uroka po teme statika
The vector sum of all external forces acting on the body must be zero. To ensure a body does not move translationally
An idealized model of a body where the distance between any two of its points remains constant, regardless of the forces applied. The point through which the resultant of all
The point through which the resultant of all gravitational forces acting on the particles of the body passes, regardless of the body's orientation. For simple geometric shapes made of uniform material, it coincides with the geometric center.
(Clockwise moments are usually considered negative, and counter-clockwise moments positive).
If displaced, the body remains in its new position (the height of the center of gravity does not change).