I suggest you read the Wikipedia article on "energy". There is really no definition of "energy" that's short, easy to understand, and accurate; the reason for this is that "energy" is a fairly complex concept. You might say that it's a magnitude in physics that is conserved - you can't increase or decrease the total amount of energy. However, note that there are several other magnitudes in physics that are also conserved.
kinetic
energy is defined as the ability to do....work.
energy
a form of energy
A fourm of energy
kinetic
energy is defined as the ability to do....work.
*A+*energy
Energy is often defined as the potential for doing work
energy
A fourm of energy
a form of energy
Using the energy does not deplete the source of the energy.
Mechanical energy is defined as the sum of kinetic energy + potential energy.
Internal energy is defined as energy associated with the random, disordered motion of the molecules.
Internal energy is defined as energy associated with the random, disordered motion of the molecules.
particles