Here we introduce rotational and translational motion in analogy to fluids and electricity. Combine the starting and stopping of currents with storage, and you get oscillations. If these processes run in extended media, we get waves.
In processes of rotational and translational motion, objects exchange spin (angular momentum) and "quantity of motion" (momentum), respectively. The principles of balance of spind and momentum are at the heart of the phenomenon of motion.
Nature provides us with many examples of motion. Fly-wheels, clock pendulums, bungee jumping, train switching, or space travel will serve as intersting cases that provide the background for our study of motion.