# Work Energy

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Energy is the capacity of doing work.  Energy is never created or destroyed but external work performed on a conservative system goes into changing the system's total energy.

## Formulas that use Work Energy

 $$\large{ W=\Delta E = E_2 \;-\; E_1 }$$

### Where:

$$\large{ W }$$ = work

$$\large{ E }$$ = energy

$$\large{ \Delta E }$$ = energy differential