Torque on Two Different-Sign Charged Objects

[denfaro]

Homework Statement

Almost Done.

Relevant Equations

T=p*e

Hi I am confused in this question. What Can I do after the steps in second photo?

 

[BvU]

What Can I do after the steps in second photo?

I think you are done: you have calculated the torque, which is what the exercise asked...

 

[kuruman]

I think you are done: you have calculated the torque, which is what the exercise asked...

$\dots$ except for the units.