**EXAMPLE 1: POTENTIAL ENERGY
**

Calculate the potential energy of a constant force
__ F__.

**Solution:**

Since __F__ is constant, then
are constant. V is a function of (*x,y,z)*. Therefore

Note that the constant of integration is not a real
constant but is a function of *y* and *z.*

Substitution of (4) into (2) GIVES

Substitution of (5) into (3) gives

Therefore, the potential energy of a constant force
__ F__ is