* Mechanical energy is the sum of potential energy and kinetic energy.
* Potential energy is stored energy due to an object's position or state. In the case of a flying disk, it has potential energy due to its height above the ground.
* Kinetic energy is the energy of motion. The flying disk has kinetic energy because it is moving.
Therefore, a flying disk moving through the air possesses both potential and kinetic energy, making it a form of mechanical energy.