Question

Law of conservation of energy says, ‘ Energy cannot be created or destroyed’
then why do we need to conserve energy?

Answer 1

This law, first proposed and tested by Émilie du Châtelet, means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another. For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes.

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Answer 2

Answer:

Explanation:

This is because when we use energy it is transformed into such a form that it is not possible to use it again. So that is the reason why we need to conserve energy.