Question

conservation of energy sources is a need of time.... justify the statement ​

Answer 1

Explanation:

Conservation of energy plays a very vital role in our life as energy does. Overutilisation of non renewable resources can lead to depletion and adverse effects on our lives.If we lost our essential resources like coal and petrol we will lose the comfort of our life so it becomes more important to save them.

Answer 2

Answer:

• In physics, the term conservation refers to something which doesn't change. This means that the variable in an equation which represents a conserved quantity is constant over time. It has the same value both before and after an event.
• There are many conserved quantities in physics. They are often remarkably useful for making predictions in what would otherwise be very complicated situations. In mechanics, there are three fundamental quantities which are conserved. These are energy, momentum and angular moments
• Conservation of energy applies only to isolated systems. A ball rolling across a rough floor will not obey the law of conservation of energy because it is not isolated from the floor. The floor is, in fact, doing work on the ball through friction. However, if we consider the ball and floor together, then conservation of energy will apply. We would normally call this combination the ball-floor system

Explanation: