Physics

Problem

ILLUSTRATION 1.13 A charge

Q

located at a point

\vec{r}

is in equilibrium under the combined field of three charges

q_1

q_2

and

q_3

. If the charges

q_1

and

q_2

are located at points

\vec{r}_1

and

\vec{r}_2

, respectively, find the direction of the force on

Q

due to

q_3

in terms of

q_1

q_2

\vec{r}_1

\vec{r}_2

, and

\vec{r}