I must be missing something. This segment of a circle would seem to corrolate to arclength which may or may not be a distance from a point where theta = pi or theta = 0. It may be a small section -- like a sliver of a pie or something. This would mean this "dL" would be the arclength between two...
I haev a homework problem where I need to find the magnitude and direction of the electric field from a thin, uniformly charged 18cm rod bent into a semicircle. The test point is at the center of the semicircle.
It seems pretty basic but I am stuck on a point (assuming I am even on the right...
Well it is a circular orbit and I can calcualte the force attraction between the two using coloumb's law but only as a function of r since I don't know the radius. And perhaps I use one of Newton's laws F=mv^2/r but I don't know if I Can really use a specific mass of an electron. Can I assume...
I have this problem where we have to determine the radius between an electron orbiting a proton. It is assumed they attract each other with a 1/r^2 electric force. I assume this means they follow coloumb's law of k(q1*q2/r^2). The first part of the question asks...if the period of orbit is 24...
I guess I am confused because the inertia of the disk includes a portion of the axle (that portion inside the disk) which leaves basically two cylinders on the sides of the disk if you can visualize that. We can just assume a continuous object, find that inertia and go on with it? That just...
I edited my post after you responded. Sorry about that.
You are right about your last message and the masses are not equal.
The mass of the axle is .1 kg (not including the part inside the disk), and has a radius of .02m. The mass of the disk is .8kg and its radius is .12cm. This seems...
I have this problem where I need to find the acceleration of a system of a disk attached to an axle that is placed on an incline made of two parallel bars. I think I basically know how to do the problem, I just need to know how to figure out total inertia. I know the inertia of a cylinder (the...
Thank you. It just seems odd that if they would state that an equation is speed as a fucnction of position it would be much better to have that equation be v = sqrt(v0^2+2a(x-x0)). It can throw simple people like me off :).
Using a Newton equation for position and substituting (v-v0)/a for t you can get the following formula:
v^2= v0^2+2a(x-x0) where v^2 is supposedly speed. I understood speed to be tha magnitude of velocity which is the sqrt of the sum of the squares of the components (i.e. sqrt(vx^2+vy^2+vz^2))...
I would like to further understand rotational inertia. I understand that for a point mass, I = MR^2 and for a continuous object it is basically the sum of all "little" MR^2 for each element of that object. I get a little fuzzy when actually solving for I for an object. For example, if we have a...