what is energy and types of energy
Answers
Answer:
Energy
The capacity of a body to do work is called the energy of the body.
Unit of energy = Joules
1KJ = 1000 J
Forms of Energy
The various forms of energy are potential energy, kinetic energy, heat energy, chemical energy, electrical energy and light energy.
Kinetic Energy
It is the energy possessed by a body due to its motion. Kinetic energy of an object increases with its speed.
Kinetic energy of body moving with a certain velocity = work done on it to make it acquire that velocity
Derivation
Let an object of mass m, starts from rest and attains a uniform velocity v, after a force F is applied on it. Let during this period the object be be displaced by distance s.
Potential Energy
The energy possessed by a body due to its position or shape is called its potential energy.
For Example:
Water stored in a dam has large amount of potential energy due to its height above the ground.
A stretched rubber band possesses potential energy due to its distorted shape.
Types of Potential Energy
On the basis of position and change in shape of object, potential energy is of two type:
1. Gravitational Potential Energy:
It is the energy possessed by a body due to it position above the ground.
2. Elastic Potential Energy:
It is the energy possessed by a body due to its change in shape.
Expression for Potential Energy
The potential energy (Ep) is equal to the work done over an object of mass ‘m’ to raise it by a height ‘h’.
Thus, Ep = mgh, where g = acceleration due to gravity.
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Answer:
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Explanation:
energy energy in physics the capacity for doing work. it may exit in potential, Kinetic, thermal ,electrical, chemical, nuclear or other various forms. there are moreover ,heat and work-i. e., energy in the process of transfer from one body to another.