牛津字典

Kinematics: The branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.

Dynamics: The branch of mechanics concerned with the motion of bodies under the action of forces.

即Dynamic是“动力学的”，通常涉及“力”和“运动”，Kinematic是“运动学的”，只涉及“运动”本身，通常是物理的。