Merriam-Webster online dictionary defines KINETIC as:
the forces and energy associated with the motion of material bodies
The hell you say! How can you use that word in a sentence. Well… right now I am going to use the help of Wikipedia:
The cars of a roller coaster reach their maximum kinetic energy when at the bottom of their path. When they start rising, the kinetic energy begins to be converted to gravitational potential energy, but the total amount of energy in the system remains constant; assuming negligible friction and other energy conversion factors.
In layman’s terms, let’s say your car breaks down on the side of the road and every time a car goes by, your car is “pushed” by the air that is displaced by the other cars passing. I’m pretty sure that is also considered kinetic energy.