The SI unit for energy is the joule.
The SI unit of electrical energy is the joule (J), the SI unit of mechanical energy is also the joule (J), and the SI unit of thermal energy is the joule (J).
The official unit for any type of energy (not just mechanical energy) is the joule. The official unit for any power (not just electrical power) is the watt, equal to joules / second.
Mechanical energy is typically measured in joules. This unit combines both kinetic energy (due to motion) and potential energy (due to an object's position or state).
by adding the objects kinetic energy and potential energy
Mechanical energy is associated with the motion or position of an object. It can occur as potential energy or kinetic energy.
Joule -- a unit of electrical/mechanical/heat energy
The practical unit of energy is the joule (J). It is the standard unit of energy in the International System of Units (SI) and is used to quantify various forms of energy such as mechanical, electrical, and thermal energy.
Power; its SI unit is watt. Please note that this is notspecifically an electrical unit; "power", and the unit "watt", is the rate of energy conversion, and can be used anywhere where energy is converted - whether "work" is involved, or some other (non-mechanical) energy.
Joule -- a unit of electrical/mechanical/heat energy
The energy content of a mechanical wave is characterized by its amplitude and frequency. A wave with higher amplitude carries more energy, while a wave with higher frequency carries more energy per unit time. The energy of a mechanical wave is proportional to the square of its amplitude.
The 'ERG' is the standard unit for work or mechanical energy.
The unit of energy, the joule, was named after James Prescott Joule, a British physicist who discovered the relationship between mechanical work and heat. While he did not invent the concept of energy, his experiments and measurements were crucial in developing the understanding and definition of this fundamental unit.