Question

Define Energy and also the different forms of energy. In Physics.

Answer 1

Hi

Energy : Energy is the capacity for doing work .

The different froms of energy are as follows :


Potential energy

Kinetic energy

Thermal energy

Electrical energy

Chemical energy

Nuclear energy


Energy can neither be created nor be destroyed. it can only change into one form to another form.

Answer 2

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When a car runs, the engine of the car generates a force which displaces the car.
In other words, work is done by the car. This work is done on the expense of fuel. Fuel provides energy needed to run the car. Had the petrol tank been empty car could not be run the conclusion is that, there is no source of energy, no work will be done.

Anything which is capable of doing work had energy.
For example, the steam pushes up the lid placed on the boiling water container. It means, the steam has the ability or capacity to do work. The work done by the steam on the lid is equal to the energy of the steam.

$\underline{Definition\:of\:Energy:}$ The capacity of doing work by the body or an object is known as the energy of body or the object.

■ Energy is a scaler quantity.
■ SI unit of energy is Joule(J).
■ In CGS system it is erg .

Different forms of Energy

Chemical Energy :: Petrol, diesel, Kerosene oil, Coal, Charcoal, CNG, LPG are fuels which are rich in chemical energy energy released during chemical reaction is known as chemical energy.

Heat or thermal Energy :: The energy possessed by a body due to its temperature is called heat energy. This energy is related to kinetic energy of constituent particles (atoms, molecules) of the body.

Light Energy :: The energy which produces sensation of vision in our eyes is called light energy.

Electrical Energy :: The energy of moving electrons in a conductor connected with a battery is known as electrical energy.

Nuclear Energy :: The energy released by the nuclei during fission or fusion process is known as nuclear energy.

Mechanical Energy :: The energy possessed by a body because of its speed or position or change in shape is called mechanical energy. It is the sum of kinetic energy and potential energy of a body.

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Hope this helps. . . . . . ☺☺☺