Mechanical energy is not an example of potential energy, as its energy due to motion.
Potential energy is energy due to the position
1. chemical energy - potential energy
- [energy of atoms due to its postions]
2. gravitational energy - potential energy
- [energy due to its positon]
3. mechanical energy - not potential energy but kinetic energy
4. nuclear energy - potential energy
- [ energy due to position of particles in nucleus]