n.
Branch of mechanics that deals with the motion of objects in relation to force , mass , momentum , and energy .
Dynamics can be divided into two branches, kinematics and kinetics. The foundations of dynamics were laid by Galileo , who derived the law of motion for falling bodies and was the first to recognize that all changes of velocity of a body are the result of forces. Isaac Newton formulated this observation in his second law of motion (see Newton's laws of motion ).