[填空题]
The work done by an external for4u06 t xvxk3vzce toek( m-6vu5 nur move a $-8.50\mu C$ charge from point a to point b is $15.0 \times10^{ -4}\;J$. If the charge was started from rest and had $ 4.82\times10^{ -4}\;J$ of kinetic energy when it reached point b, what must be the potential difference between a and b? V
