Recent content by torq123

I have two questions that I think are analogous (tell me if they are not). 1. If I have a spring scale and apply 50 pounds of force to one side and 40 pounds to the other, what would it read and why? (I think it will read 45 pounds because that is what the tension would be if it were a rope)...

Awesome. Thanks for the help.

Are you saying that the second term must be zero since \phi vanishes at ±∞ and the integral evaluates to \phi^2(x)/2? That makes sense to me.

Homework Statement What is the average momentum for a packet corresponding to this normalizable wavefunction? \Psi(x) = C \phi(x) exp(ikx) C is a normalization constant and \phi(x) is a real function. Homework Equations \hat{p}\rightarrow -i\hbar\frac{d}{dx}The Attempt at a Solution...

Homework Statement A (smooth) rope of length L and mass m is placed above a hole in a table. One end of the rope falls through the hole, pulling steadily on the remainder of the rope. Find the velocity of the rope as a function of the distance to the end of the rope, x. Ignore friction of...

Hi all, I want to make sure I am understanding this correctly. Say we have two identical particles orbiting (in circles) about their center of mass. We know that the average potential energy is -2 times the average kinetic energy. So the average total energy is negative the average...

You say that I know the cylinder rolls down the ramp. That is not necessarily true--I understand that case (I think). But friction also points up the ramp if the cylinder rolls down it. It's the fact that it's up in both cases that confuses me.

Torque, in particular, is always a concept that has confused me. Can the rules related to torque be derived or are they natural tendencies? (For lack of a better way to phrase this). For example, if I were trying to solve the problem of a ladder leaning against a frictionless wall, where I...