Recent content by jk494

Why aren't they possible? I really have no idea how to go about visualizing this properly. What does "force balance" mean? Why would the person rise relative to the ground if the rope is moving down as they are pulling it? I have watched videos of atwood machines and when one side goes up a...

Every point is moving L relative to the person on the rope. That can happen 2 ways. If the block stays in place and the person climbs a distance L up the rope. Or, the person stays in place relative to the ground and pulls a length L of the rope down through their hands. My solution says that...

Ok so doesn't that mean that the point 2L away is now only L away? So for any number c the distance away after climbing is cL - L? That sounds to me like every point on the rope has to move L.

Does that mean the person moves a distance L along the rope? I can only picture myself climbing a rope and I moved a distance L along it. Because the length of the rope is constant, the L I pulled down had to come from the other end of the rope, so the point of the rope that was formerly...

I included the diagrams in the other thread to show you how I was visualizing the problem. I see the distinction but if all points on the rope move a distance L then the block also accelerates with acceleration a to move up a distance L. When you are climbing the rope, you are accelerating...

I replaced them. Are these better?

Homework Statement [/B] As stated in the included pics, you are climbing up a massless rope on a frictionless pulley, attached to a block equal to your mass which is hanging on the other side. You move a distance d along the rope. Does the block move? If so, how much? Homework Equations F =...

Please forgive me for the confusion, I should make a separate thread addressing the problem I just posted in my reply.

Wow, I did not expect to see that. I really thought I was going crazy. I did an experiment with measuring tape and got the same result as my calculations. For some additional context, here is the problem I was working on and its solution. Is there an error in this?

Hi everybody, I've really been struggling with this basic idea, I have drawn it out about half a dozen times, watched numerous videos, read descriptions, played with applets but I still can't see it. Lets just start with a simple atwood machine with a massless rope and frictionless pulley...

I've come across it it at least half a dozen classes in my life but I never really learned how to do uncertainty calculations properly. Right now I am torn between what is taught and what makes intuitive sense. In every book or website there is a different explanation of this concept with...

Hello everybody, I am a class of 07'er still working on my bachelors degree. I've had a life full of obstacles up to this point but I really want to get my physics PhD and do biophysics research to develop medical treatments with nanomachines. I look forward to working with all of you for the...