Final answer:
Dynamics is the study of motion without considering the cause, while kinematics describes motion without considering its cause. Both are important in understanding motion in physics.
Step-by-step explanation:
Dynamics is described as the motion of points, bodies, and systems without consideration of the cause of motion. It focuses on the effect of forces on each other. On the other hand, kinematics is the branch of physics that describes motion without considering its causes. It involves properties such as position, time, velocity, and acceleration. Dynamics and kinematics are both important aspects of understanding motion in physics.