This may sound incredibly dumb, but how do I exactly go about doing that? We weren't given any values. The answer should be "in terms of the charge density lambda and the radius of the arc R."
On the test the teacher corrected my answer of E = \frac{\lambda}{4\pi\epsilon R} by adding...
I follow your (very well executed) reply to that question but it still leads me to where I got in the first place.
I come to E = \int^{\pi/2}_{0}\frac{\lambda}{4\pi\epsilon R}\cdot sin\theta\cdot d\theta
Homework Statement
A circular arc of charge has a radius R and contains a total charge Q. If the angle of the arc is 90 degrees find:
a) the charge density of the arc
b) the electric field at point P in terms of the charge density L and the radius of the arc R
L should really be lambda...
I've read similar posts and have tried the problem several times but don't get the right answer.
Homework Statement
A uniform ladder with a mass of 15 kg leans against a frictionless wall at a 65 degree angle. Find the required friction coefficient (u) at the floor that will allow a 100kg...