Recent content by Jefferson

Oops, sorry, didn't mean to double post.

Homework Statement There is a −3 µC point charge at (0,0,4) and a +3 µC point charge at (0,0,-4). What is the magnitude and direction of the electric field at point (0,0,8)? What is the magnitude and direction of the electric field at point (0,0,8)? [/B] Homework Equations E = \frac{ k_e q...

In case anyone is wondering I did finally find out how these problems are different. Some are using the definition of work as $$\int F \cdot \, ds$$ whereas others, such as the tank problem, are using the definition of work as the potential energy change, i.e. $$E_f - E_i =$$ Work, or $$mgh_f -...

OK, I think I get some of what you are saying, but I'm still not totally clear. It is sort of like you are doing two integrals at the same time so that you can add up the two different quantities? What exactly is a line integral? Is the dl in the examples representing distance or is it the...

I have a question about work integrals. I'm trying to reconcile using integrals to essentially multiply force by distance, but the fact that there appear to be multiple different types of problems that seem to be fundamentally different is making it difficult. Here are some example problems...