Thanks for the fast response.
What does double-valued mean? Where does 2d come from (I thought we were only dealing with the length d!)?
I think what you said could really help but I don't understand it! If you could rephrase what I quoted above, it would be really helpful.
Homework Statement
A point charge +q is located a distance d from one end of a uniformly charged rod. The rod has total charge +Q and length L. (The rod and the point charge are each held fixed in place.)
What is the force on the point charge due to the rod...
I just realized that my last response makes it sound like I solved the problem. I actually drew the directions correctly on my FBDs, but I wrote them out wrong on the forum.
Thanks for the corrections, any more help is appreciated :)
Oops, I've said my directions completely wrong!
The small block has a frictional force down the ramp, a normal force up and perpendicular to the ramp, and weight downward.
Homework Statement
A small block of mass m rests on the rough, sloping side of a triangular block of mass M which itself rests on a horizontal frictionless table as shown in the figure.
http://s7.photobucket.com/albums/y252/mikey555/?action=view¤t=GIANCOLIch05p033.jpg
(edit: image...