Recent content by mekrob

Wow, thanks. Not that complicated when you do it correctly.

Trajectory of a bullet with drag In most physics books, they pass over drag problems because of their difficulty. However, I had to do one for a mid-term for a physics class. When the velocity is low (tens of m/s or less), then the drag is proportional to the velocity and the math is quite...

Hi, I've been asked to turn the Navier-Stokes Equation (incompressible flow, constant density) into the Reynold's Equation. However, I can't find the Reynold's equation in my notes or book. I don't need help solving the problem, I just need to know the end result, otherwise I have no idea...

Govorim malo hrvatski. Laku noch. Drage gushe moje. Čarape su najbolje kvalitete. On je bio u večernjem odijelu. That's about it.

Going through the Lagrangians, I got \ddot {x_{1}} = \frac {gsin(\alpha) - \frac {kx_{2}}{m} - \ddot{x{_2}}}{cos(\alpha)} and (4m' + m + M) \ddot{x_{1}} + 2I\omega^2 + m(\ddot{x_{1}} + \ddot{x_{2}}cos\alpha) = constant Again, I got these right on the exam, apparantely, I was just never...

This was on an exam (studying for the final). I wrote the same answer on the exam and the only mark the prof made was asking which are x_{1} and x_{2}, which I had forgot to clarify. I received most of the points for the question, so I assume it's right.

A rough drawing with paint of the problem.

Homework Statement A cart of mass M rides on four frictionlesly mounted wheels of radius a and mass m'. The top of the cart is sloped at an angle alpha horizontally and a mass m is suspended from the top of the slope of force constant k. m slides without friction up or down the slope. a)...

Hey, I'm just having some trouble getting started with this problem. ------------- ( ) ( m1 ( ) ( 2m1 Crude representation: (The parantheses are supposed to be the springs) There is a mass (m1) that is attached vertically to a board by a spring of...

Fcor = 2mr' x Omega = 2mv x Omega Omega depends upon the location of the object since the Earth isn't a perfect sphere. But it's generally seen as about 7.3 x 10^-5 s^-1. When Coriolis is added to free fall, the equation becomes r''= g + 2r' x Omega. r'= (x',y',x') and Omega (0,Omega...