Question

How do we define the energy conservation? Explain energy transfer on the basis of three different example​

Answer 1

Answer:

Explanation:

Energy is all around us. It's flowing in our bodies, flying through the air, and beating down on us from the sun. It's everywhere. But what exactly 'is' energy? And how is it 'conserved?'

Explaining what energy is can be difficult. The physics definition says that energy is a currency that allows you to do work. Work is done when you apply a force over a distance, or transfer energy from one place to another. So, all that really says is that energy allows you to transfer it, and to do that, you apply a force.

Perhaps it's easier to talk about what energy allows us to do. Energy in most human situations originates from the sun. Energy from the sun allows the plants to grow, and animals eat those plants to get energy for themselves. We humans eat both plants and animals to get our energy, but either way the energy originates in the sun. But even the sun isn't the start of the story, because the sun gets its energy from the nuclear energy stored inside hydrogen atoms, and those hydrogen atoms originate back to the Big Bang that started the universe.

The story of energy never ends, because energy can never be used up - it is said to be 'conserved.' Conservation of energy is the principle that energy is not created or destroyed; it only moves from one place to another - from one type of energy to another.

The food you burn in your body to give yourself energy gets transferred into other objects and into the rotation of the Earth itself when you move around, lift things, or ride a bicycle. It never disappears.