Two identical electric point dipoles have dipole moments p_1 = p i and p_2 =- p i and are held on the x axis at distance ' a ' from each other. When…

Two identical electric point dipoles have dipole moments $\displaystyle \overrightarrow{\mathrm{p}_1}=\mathrm{p} \hat{i}$ and $\displaystyle \overrightarrow{\mathrm{p}_2}=-\mathrm{p} \hat{i}$ and are held on the $\displaystyle x$ axis at distance ' $\displaystyle a$ ' from each other. When released, they move along the $\displaystyle x$-axis with the direction of their dipole moments remaining unchanged. If the mass of each dipole is 'm', their speed when they are infinitely far apart is: