Question

what is energy and it's forms
​

Answer 1

Answer:

Energy exists in many different forms. Examples of these are: light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy and so on. ... Potential energy is any form of energy that has stored potential that can be put to future use.

Answer 2

Energy

The word Enegry refers to a concept that can be paraphrased as " the potential for causing changes " and therefore one can say that energy is the cause of any change.

Energy can neither be created nor destroyed. It can be converted from one form into another. The total amount of energy in the universe remains constant.

Energy is the capacity of a body to do work unit of energy = Joules

1KJ = 1000 J

Types of energy

• Hear energy
• Chemical energy
• electrical energy
• light energy
• Mechanical energy etc.
• The various forms of Mechanical energy is further divided in 2 types
• (i) Potential energy
• (ii) Kinetic energy

Kinetic Energy

• it is the energy that an object has due to motion. it is the energy of a moving body.
• Kinetic energy of an object increases with its speed. It depends on mass and velocity.
• Kinetic energy of body moving with a certain velocity = work done on it to make it acquire that velocity.
• Kinetic energy = work done on the object

Formula -

$\sf \: kinetic \: energy = \dfrac{1}{2} \: {mv}^{2}$

$\sf \: kinetic \: energy = \dfrac{1}{2}m (mass) \: {v}^{2} \: (velocity \: square)$

Potential energy

• The energy stored in a body due to its position is called it's potential energy.
• example - Water stored in a dam has a large amount of potential energy due to position i.e - it's height above the ground

Formula

P.E = mgh

Potential energy =( mass ) ( gravity ) ( height )