- #1
EnricoHendro
- 80
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- TL;DR Summary
- I have heard the word energy countless times but still haven't read or heard about what it actually is. Can someone explain it to me?
Hello there,
I have heard countless times about the word energy, but I still don't know what exactly an energy is. Like for example, we know the definition of a physical quantity called velocity which by definition is change in displacement (so we can easily describe what a velocity is). We can also easily describe what an apple is. But in case for energy, I have yet to find the exact definition of energy (other than the mathematical equation of, for example kinetic energy and potential energy). We know that work, electromagnetic radiation, electric transmission, heat, matter transfer are simply means to transfer energy to a system from the environment. But what is this energy? I mean what is this thing that work transfer? (like if we say a pass a basketball from our hands to other people, we know that it means we are transferring a basketball into other people, and we can define the "object" that we are transferring). I've read a thread in this forum asking this question, but I still haven't read a clear definite answer describing what an energy is.
I have heard countless times about the word energy, but I still don't know what exactly an energy is. Like for example, we know the definition of a physical quantity called velocity which by definition is change in displacement (so we can easily describe what a velocity is). We can also easily describe what an apple is. But in case for energy, I have yet to find the exact definition of energy (other than the mathematical equation of, for example kinetic energy and potential energy). We know that work, electromagnetic radiation, electric transmission, heat, matter transfer are simply means to transfer energy to a system from the environment. But what is this energy? I mean what is this thing that work transfer? (like if we say a pass a basketball from our hands to other people, we know that it means we are transferring a basketball into other people, and we can define the "object" that we are transferring). I've read a thread in this forum asking this question, but I still haven't read a clear definite answer describing what an energy is.