Tagged Questions
1
vote
4answers
126 views
Is it possible to whirl a point mass (attacted to a string) around in a horizontal circular motion *above* my hand?
I'm studying circular motion and centripetal force in college currently and there is a very simple question but confuses me (our teacher doesn't know how to explain either :/), so I hope we can sort ...
3
votes
1answer
46 views
Boundary conditions on wave equation
I am having trouble understanding the boundary conditions.
From the solutions, the first is that $D_1(0, t) = D_2(0, t)$ because the rope can't break at the junction.
The second is that ...
12
votes
5answers
1k views
Why Won't a Tight Cable Ever Be Fully Straight?
I posted this picture of someone on a zipline on Facebook.
One of my friends saw it and asked this question, so he could try to calculate the speed at which someone on the zipline would be going ...
1
vote
0answers
249 views
Neglecting friction on a pulley?
So, this is how the problem looks:
http://www.aplusphysics.com/courses/honors/dynamics/images/Atwood%20Problem.png
Plus, the pulley is suspended on a cord at its center and hanging from the ceiling.
...
0
votes
1answer
77 views
Finding the acceleration of Block attached using tricky string setup
Below shown is a setup, and block B starts from rest and moves towards right with a constant acceleration. Does the acceleration differ for the blocks ? I am a bit confused because of the tricky ...
-3
votes
1answer
82 views
Work done by an ideal, massless, inextensible, non-relativistic string [closed]
what is the work done by an ideal, massless, inextensible, non-relativistic string in an isolated system with respect to a reference frame at rest? If it is zero, then why?
0
votes
1answer
695 views
Understanding tension
I'm trying to understand tension. So here it goes:
I'll start from the beginning.
Let's assume I'm in space and can move around and apply forces.
Let's say a rope is attached to a body(which is in ...
2
votes
1answer
150 views
How can Hilbert spaces be used to study the harmonics of vibrating strings?
The overtones of a vibrating string.
These are eigenfunctions of an associated Sturm–Liouville problem.
The eigenvalues 1,1/2,1/3,… form the (musical) harmonic series.
How can Hilbert spaces be ...
5
votes
4answers
4k views
Rope tension question
If two ends of a rope are pulled with forces of equal magnitude and opposite direction, the tension at the center of the rope must be zero. True or false?
The answer is false. I chose true though and ...
