Recent content by SchruteBucks

Sorry, I should've mentioned that my prof. says that the "symmetry of the situation means only one is needed." As far as if dq=σdxdy, I'm assuming it's just σdy since it's only supposed to be a single integral, but in all honesty, I have no idea. Maybe the other integral isn't needed since we...

Homework Statement The picture attached shows an insulated board (12m x 4m) with uniform charge density σ. Integrate to find the electric field 8 cm above the center of the board.Homework Equations I found the equations \vec{E}=\int\frac{kdq}{r^{2}}\hat{r} and dq=σdy (both from google)The...

WOW great responses, and fast too...this makes my homework MUCH easier! I'm glad all of you understood what I was trying to ask, and the answers couldn't have been any clearer! I even have some useful equations to use now. EXTREMELY helpful, I can't thank you enough!

This is more of a question about a concept than the actual homework problem. The homework problem gives diagrams of rods with varying charge densities, but there's one important concept I don't yet understand, and it's stopping me from moving on in the problem. My question is even more...

Thanks for the feedback, VERY much appreciated! Wish me luck as I go try to argue for some points back on my homework then. It's usually pretty difficult to argue physics with a guy who has a Ph.D. in the subject though...and actually knows what he's talking about :|

I had a question (very similar to this) for homework a few days ago, which was basically: In which arrangement will the electric field at the leftmost point be largest and in which will it be the smallest? A. (+)-------(+) B. --------(+)-------(+) or C. ----(+)---(+)...

@JHamm: That's what I did in my free body diagram (with the object at angle theta). The radial components are the normal force (N) and the radial component of the object's weight(Wr), which seem to cancel each other out, and there is a tangential component of the object's weight that is...

Wow...so you CAN use that circular motion equation. That blows my mind! I mean, after drawing a free body/force diagram, it looks as if the net acceleration should be nearly tangential to the circle, not towards its center. Do those types of diagrams not apply to circular motion? I guess I...

I'm still new to this, but it looks like you've got everything right except for the last part of your final energy calculation (the 0.5(2/5)mr^(2)(v/r)^2 part). I'm not quite sure why it's there, but I'm pretty sure that's the part that's throwing you off.

Circular motion problem...ON THANKSGIVING! A sled starts from rest at the top of a hemispherical frictionless hill of radius R. http://desmond.imageshack.us/Himg37/scaled.php?server=37&filename=sled.png&res=medium a)Find the velocity of the sled at angle theta in terms of theta, R, and g...

@PeterO: I'm 99% sure that's what I was supposed to look for (the x displacement), so that's what I'm sticking with. Thanks for all your help! @gneill: You genius of a man (or woman), that's exactly what I was looking for initially, and out of curiousity, I "went to town" on the arclength...

First off, thanks for the reply! The exact wording of the problem was "Calculate its height and the distance traveled to its maximum height", so maybe I am overthinking the problem. If that's the case, then I'm already done with it. I have a max height of 14.4m and a displacement in the...

I need to calculate the max height and distance (at the max height) of a ball traveling 33.6m/s 30 degrees above the x-axis. The max height was no problem, but I tried finding the distance using an arc length equation (with respect to time) and it didn't work. My distance was shorter than my...