- #1

superamazinPI

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## Homework Statement

Consider an electric dipole located in a region with an electric field of magnitude [tex]\vec{E}[/tex] pointing in the positive y direction. The positive and negative ends of the dipole have charges

*+q*and

*-q*, respectively, and the two charges are a distance

*D*apart. The dipole has moment of inertia

*I*about its center of mass. The dipole is released from angle [tex]\theta[/tex], and it is allowed to rotate freely.

What is [tex]\omega_{max}[/tex], the magnitude of the dipole's angular velocity when it is pointing along the y axis?

## Homework Equations

dipole moment

*p= qd*

[tex]\vec{\tau}[/tex]=[tex]\vec{p}[/tex]X[tex]\vec{E}[/tex]

U= -[tex]\vec{p}[/tex] [tex]\cdot[/tex][tex]\vec{E}[/tex]

## The Attempt at a Solution

I attempted to use energy, but I am not sure how to do it correctly - does potential energy equal kinetic? is the potential energy the one described in the above equation?