Ha, Monet, I get you. I had a similar experience. I walked into a mathematical methods for physics class that i'd heard horror stories about. intimidated. I was only taking it because it was required for my then major. Anyway, i expressed my fear to my professor and she said something like: "It...
I am almost done with my junior year at a top 15 liberal arts college. I'm majoring in physics with an overall gpa of 3.5 which I hope to pull to a 3.6 by graduation. My physics gpa is about 3.85. I am interested in attending a top school to do medical physics. Duke, UChicago,UW-Madison, and...
Okay, Daniel, my post looks a bit more intelligible :yuck: now so please check it and give me some feedback aight:) I actually love doing physics this way. I mean physics is fun even if its hard but this is waaaay cool. I'm becoming a physics forum adict. :biggrin:
okay, back to the...
Hamilton equations of flyball governor
I'm trying to find
1. The Hamiltonian
2. The Hamilton equation of motion for the flyball governor shown in problem 2 here
This is what i have. Can someone tell me if i'm right...
so t = 7v/5gsin (theta) but v = vi so
t = 7vi/5sin(theta)?
It just seems wierd that we're suddenly replacing the velocity with which it hits the ground with its initial velocity (even though i understand that vf = vi)
Is there something i'm missing? or am i just thinking too hard?
okay, but when i solve for t, my expression will involve v not vi. Should i then make vi the subject of my x expression from a) and plug vi into my t? (the vi expression will involve v meaning my final t expression will involve v)
I'm also not really sure why you say v = vi at the end. Is it...
Hey Doc Al,
Thanks. I think i figured out the 3rd part.
I first found the acceleration.
since w = v/r ; v = wr
a = w(dot -on top of it--hehe) r
w(dot) = a / r
I w(dot) = Fr where F is friction
ma = mg sin (theta) -F
If you plug expression for F into it
a = 5/7g sin(theta)...
Need Help Here!!
A sphere or mass, m and radius r rolls along a horizontal surface with a constant velocity, Vi approaches an incline with (angle theta). ie bottom angle :smile: If it rolls without slipping,
a) what is the maximum distance,x it will travel on the incline?
b) If it begins to...
How do i find the period of small oscillations and length of the equivalent simple pendulum, for a rectangular plate (edges a and b) suspended at its corner and oscillating in vertical plane?
T = 2pi (I/mgl)^1/2
i calculated l (length) to be (a^2 + b^2 )^1/2 ---(the diagonal) is this right...
The distance between one corner of the rectangle and the center is going to be
(a^2 + b^2 )/4 right? so if i plug this into the equation as my 2, that shd work.
I'm using pythagorean theorem to find this r.
Okay, lets see...:)
I = r^2 dm --according to definition:)
rho = m/ab
dm = rho * da*db (since x and y are really a and b in this case--right?)
dI = r^2 * rho* da*db
dI = (r^2 * m * da* db )/ab
i will then have to do a double integration right? over limits 0 to a/2 and 0 to b/2...