Recent content by MartinLoland

Yes thanks. When I worked through it earlier I got different numbers. But working it out once more I found that the r cancels out when using method 1. So it all makes sense now :)

Hmm, I have no idea why my earlier results yielded different numbers. Some times all you need is someone looking over your shoulder, thank you for your patience!

Yes, if you use method 2 the moment cancels out in the pulley so you are left with a smaller M than what you get with method 1. Is it wrong to do a global analysis as in method 1 when you have freely rotating wheels in that system? Another way of stating the problem: Is the reaction moment...

In theory the two methods shouldn't produce any differences. But if we look at the pulley as a isolated system and find the x and y forces acting in the bearing we are only left with M, but since the two S are producing the same moment with equal distance r my understanding is that M=0 in the...

Homework Statement I am trying to understand how forces transfer from a wheel / pulley onto a beam, and then calculating the resulting moment. The image describe the problem. The rope is in tension with force "S", the wheel/pulley can rotate freely without any friction. Homework Equations...

Thank you for your thorugh answer, it really helps! I tried to solve it in two ways; using forces and energy and tried to compare the results. I am posting them here as they may be to help for others. Some assumptions: Constant deceleration and torque The elevator and counterweight is held by...

Homework Statement Hello! I am doing some rough design on an elevator-system and I have now come to the brake. Here is my system: The text is norwegian but "rdriv" in the first image is "Rdrivskive" in the second image and it's this wheel that is dragging the rope. The "Brems" is where I...