Kinematics is the branch of physics that studies motion of bodies without considering or analyzing forces and the causes of the motion Kinematics is often known as the geometry of motion and is often seen as a branch of mathematics and sometime as the branch of mechanics Using contretemps from geometry the velocity acceleration and speed of any section of the system that are unknown for us can be firmly determined by not changing it Kinetics is the study of how bodies fall within it In many situations kinematics is used in astrophysics Astrophysics is the branch of astronomy that deals with the stars and other celestial bodies In biomechanics kinematics and robotics is described the movement of systems that made of connected parts which is called multi-linked systems such as the human skeleton a machine that it's part are moving or the robotic arm Geometric transformations are also called rigid transformation a transformation that doesn't change its shape or its size which are used for describing in a mechanical system the movement of components making it to obtain something from a source of the equations of motion making it simpler or easier to understand