Homework Statement
A light, flexible rope is wrapped several times around a hollow cylinder with a weight of 55.0 N and a radius of 0.25 m, that rotates without friction about a fixed horizontal axis. The cylinder is attached to the axle by spokes of a negligible moment of inertia. The...
[SOLVED] Rotational Motion
Homework Statement
Four small spheres, each of which you can regard as a point of mass m = 0.170 kg, are arranged in a square d = 0.250 m on a side and connected by light rods (Fig. 9.27).
(a) Find the moment of inertia of the system about an axis through the...
Homework Statement
An infinitely long line of charge has linear charge density 4.00 10-12 C/m. A proton (mass 1.67 10-27 kg, charge +1.60 10-19 C) is 18.0 cm from the line and moving directly toward the line at 1.20 103 m/s. How close does the proton get to the line of charge...
oh woops yeah I did forget R squared
so for vector path dr I'd put .48m because that's what they're looking for?
So .48Q/4piEnaughtRsquared?
Sorry, I'm just terrible at gaussian surfaces.. I never really understood how to do them
Okay thanks alot!
First problem is completely finished
But the second one I don't get..
I looked up the equation you were talking about
W(ab) = Integral of E(dot) dr
There's an example with something to do with infinity and r/2, for the first one it's zero, and the second one is r/2 so do i...
I don't know, do I do it the same way as i did for A and B?
How do you figure out the distance though?
Here's basically what I have on paper..
http://irollerblade.org/physics/phys.jpg
[SOLVED] Some of my Winter Break physics problems
Hey guys, I'm new to this site, and as the way things are going with my physics class, this won't be my last request for help lol.
Well anyway, our teacher assigned us a few problems to do over break, and since I have a week left I decided...