One joule of energy is the energy required to do 1 J of work. It is given as
1 kilo joule = 1 kJ = 1000 J
Thus, when a certain amount of force (Newton) is applied to an object and it moved certain distance (meters), then the energy applied is said to be Joules (Newton-meter).
The commercial unit (or trade unit) of energy is kilowatt-hour.
It is defined as the electric consumed by an appliance of power 1000 watt in one hour.
1 Kilowatt-hour (or) of electrical energy is commonly known as ‘1 unit’ of electricity.
There are various forms of energy. Mechanical energy (kinetic and potential), sound energy, heat energy, light energy, chemical energy, nuclear energy, electric energy, magnetic energy, solar energy, etc.
FORMS OF ENERGY
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