Recent content by stod

Homework Statement A thin insulating rod is bent into a semicircular wire of radius a, with a total charge of Q distributed uniformly along the rod. Calculate the potential at the center of the curvature if the potential is assumed to be zero at infinity. Homework Equations V=ʃ...

Ohh okay, I think I got it. Thanks for spelling it out for me.

Okay, so if I understand what you're saying, mg=Fcoulomb, and we should be able to get Fcoulomb from E(q)? How do we get q if V=kq/r is for a point charge? Basically, I don't remember finding V for parallel plates. Am I on the right track yet, though?

Homework Statement Two parallel plates are positioned horizontally and when the potential te?difference between the plates is 400 V, a charged particle is suspended freely 10 cm above the lower plate. If the potential difference is suddenly changed to 200 V, how long will it take the particle...

Thank you, I thought the vertical velocity was sqrt(2gR) for some reason. I see it now, thanks.

A ball is launched up a semicircular chute in such a way that at the top of the chute, just before it goes into free fall, the ball has a centripetal acceleration of magnitude 2 g. How far from the bottom of the chute does the ball land? Height=2R I got initial velocity=sqrt(2gR), and I...