Conservation of Energy


 
 
Concept Explanation
 

Conservation of Energy

Conservation of Energy

Energy can neither be created nor destroyed. It can only be changed from one form to another.

The above principle is called the principle of conservation of energy. It means that when all forms of energy are taken into account, the total energy in the universe remains constant. The principle is also valid for an isolated, i.e., one on which no force acts from outside.

Examples: 

1. When a ball is dropped from a height, its gravitational potential energy decreases, since its height decreases. It may seem that energy has been lost. But the ball gains speed, and hence, it acquires kinetic energy. Actually, as the ball falls its potential energy is gradually converted into kinetic energy.

.... (More Text Available, Login?)
Sample Questions
(More Questions for each concept available in Login)
Question : 1

The total energy of a swinging pendulum at any instant of time ______________________

Right Option : C
View Explanation
Explanation
Question : 2

When a body falls, then its total energy.__________________.

Right Option : D
View Explanation
Explanation
Question : 3

___________________ can only be changed from one form to another.

Right Option : D
View Explanation
Explanation
 
 


Students / Parents Reviews [20]