The problem asks me to show that the addition of two cosines with different wavelength and frequencies gives a solution with beats.
Mathematically, I need to verify that A cos (k1x-w1t)+A cos (k2x-w2t) is equivalent to A cos (.5(k1+k2)x-.5(w1+w2)t) cos (.5(k1-k2)x-.5(w1-w2)t)
I converted...
Thanks for being so prompt and helpful in your response!
So, constrained to move in a circle...that sounds like polar coordinates!
So the third term I am missing is the expression of kinetic energy for the disc in polar coordinates?
So I should find the center of mass of the disk, and that...
Thanks so much for the help...but I need some further clarification.
You said that the contribution to KE comes from the fact that the disk's center of mass can move. How do I express this mathematically as a term in my kinetic energy expression? Is what I have for Kinetic energy thus far...
Lagrange Problem redux -- super urgent...
See the attachment to help you visualize this.
A rod of length L and mass m is povoted at the origin and swings in the vertical plane. The other end of the rod is attached/pivoted to the center of a thin disk of mass m and radius r.
OK, I know that...
We have a rod of length L and mass M pivoted at a point at the origin. This rod can swing in the vertical plane. The other end of the rod is pivoted to the center of a thin disk of mass M and radius R. Derive the equations of motion for the system.
I have attached a drawing :)
If you...
The system examined in the problem is depicted below:
^^^^^(m1)^^^^^(m2)
m1 and m2 are connected by a spring and m1 is connected to the wall by a spring. The spring constant is k.
T = m/2 [ x1'^2 +x2'^2 ] kinetic energy of system (x1' is velocity of m1, x2' is velocity of m2)
U = 1/2 m...
The problem I am working on asks me to find the curve on the surface z=x^(3/2) which minimizes arc length and connects the points (0,0,0) and (1,1,1).
Here's what I did:
Integral [sqrt(dx^2+dy^2+dz^2)]
Integral [dx sqrt (1+(dy/dx)^2 +(dz/dx)^2]
Integral [dx sqrt (1 + (dy/dx)^2 + 9x/4)]...
Lagrangian Dynamics problem -- need help with setup
Here's the problem:
A simple pendulum of length b and bob with mass m is attached to a massless support moving horizontally with constant acceleration a. Determine the equations of motion.
For the pendulum, x = b sin theta and y = b cos...
Two masses m1=100g and m2=200g slide freely in a horizontal frictionless track and are connected by a spring whoser force constant is k=.5 N/m. Find the frequency of oscillatory motion for this system.
Could someone give me a hint/help me get started on this? What equation(s) should I...