What is Energy? Why is Energy All Around?

Introduction:

We need the energy to run, jump, play, and do different work.

Thus, “the ability to do work is known as energy.”

Our body gets the energy to play, think, and do work from the food we eat. Even we can’t work without eating food. We human beings get energy from food and work. So, the stored chemical energy in the food gives us the energy to do work. We get energy from food after digestion.

Similarly, non-living things like cars, buses, airplanes, fans, TV, etc., also need energy to work. But they get energy from different kinds of sources like petrol, diesel, or electricity. Cars, buses, and all vehicles can’t run without petrol or diesel. Computers, laptops, and some toys can’t work without batteries, which have chemical energy stored in them. We can’t watch TV when there is no electricity. A grinder, washing machine, electric iron, and TV can’t work when there is no electricity.

Conclusion:

Any time you do some work, you use some or other type of energy.

 Explanation:

So, can we say we use energy only when we make something work or move?

No, it is not the correct definition of energy.

Sometimes you use energy even if you are not doing work.

If you push a heavy box that doesn’t move, you are not doing work, but your energy is getting exhausted.

Work is done when a force makes an object move.

Similarly, suppose a person is just standing and carrying very heavy luggage. The person is applying force on the luggage by giving it support but the luggage does not move from its place. So, the work done by him is zero, but his energy is being utilized.

Conclusion:

Thus, we can define energy as the ability or capacity to do work. We use energy even when we don’t do any work scientifically.

Question:1

What is energy?

Answer:1

Energy is the capacity or ability to do work.

Question:2

Can we do some work without using energy?

Answer:2

No, it is not possible. Any time you do some work, you use some form of energy.

Question:3

Can we spend energy without doing some work?

Answer:3

Yes, scientifically speaking work is done when we apply force and the body moves. If we apply force and the body doesn’t move the work done is zero, but energy is being spent by applying force.  

Summary

• All things around us living or non-living function because of having energy.
• Energy is defined as the ability of a body to do work.
• Any time you do some work, you use some or other type of energy.
• Any work is done when a force makes an object move.
• We can spend energy without doing work.