It is a science that studies the forces on the bodies and movements that produce.
Study of the machines (construction and operation)
From this point of view modern watches are machines that mark the passing of time. Dimension field is never easy, set limits on time, which is the beginning and the end, it is complicated. No one has managed to establish the origins of the mechanical clock or the exact date of their invention or inventor, sometimes leaning on some bases are several people who arrive at identical conclusions.