* Mechanical Energy: Rushing water involves the movement of a mass (the water) due to forces like gravity and pressure. This movement represents mechanical energy.

* No Chemical Reactions: There are no chemical bonds being formed or broken in the process of water rushing.

* No Nuclear Changes: There is no change in the atomic nuclei of the water molecules.

In summary: Rushing water is driven by the physical forces of gravity and pressure, making it a mechanical phenomenon.