Before revision: It is a state in which the coordinates of all points are known and described by the function: where is a displacement vector are all the points of the body are all the points in the space in which the body is present Most often it is a state of the body in which no forces are applied.
After revision: It is a state in which the coordinates of all points are known and described by the function: where is a placement vector are all the points of the body are all the points in the space in which the body is present Most often it is a state of the body in which no forces are applied.