Electrostatics Part 1

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 released, they move along the x -axis with the direction of their dipole moments remaining unchanged. If the mass of each dipole is 'm', their speed when they arc infinitely far apart is: