# Tag Info

1 vote

### Tension in a massless string in various configurations

In the idealized world of undergraduate physics, the above statements and previous answer are correct. But in the real world there will be an unequal distribution of tension if the string is wrapped ...
• 111

### Why do we not consider the normal force on chain falling onto a table?

The normal force from the table cannot act on the entire rope length $h$. Only the infinitesimal part of the rope that actually hits the table or ends up eventually resting on it will experience a ...

### Tension in a massless string in various configurations

If the same massless string is placed over a frictionless pulley and the same extensive forces $x$ are applied on both ends, is the tension $T$ developed at every point (including the semi-circular ...
1 vote
Accepted

### Pseudo force as seen by an accelerating frame of refrence

As you calculated in the "regular" reference frame, there is a force acting on the wedge, causing it to accelerate. Changing to another frame of reference will not make that disappear, but ...
• 4,046

### The "small amplitude" assumption in the derivation of the wave equation for the string

OK, I think I finally understand this. The derivation of the wave equation for the string under the assumption that the restoring force is purely transversal, without any small-amplitude assumption, ...
• 21
1 vote

### Tension of rope over frictionless edge obstructing block

I would consider each bent part a point of interest. Starting at the last bend before the hanging mass, let's fix the rope on the edge and calculate the tension for this segment. Call it $|T_2|=mg$. ...

### The "small amplitude" assumption in the derivation of the wave equation for the string

Following the most recent comment, I am going to try and prove that the “vertical displacement force law” assumption implies the small-amplitude assumption. The small-amplitude assumption is ...
• 21

### The "small amplitude" assumption in the derivation of the wave equation for the string

A propos "the restoring force being proportional to the displacement," a textbook that does not use the small-amplitude assumption in the derivation of the wave equation for the string is ...
• 21

### Tension in Atwood machine revisited

As already suggested previously (How to use Lagrangian Mechanics, not Newtonian Mechanics, to find tension in a system of two hoops attached to a massless string over a pulley?) the same problem can ...
Accepted

### Spinning a rope conundrum

You are exciting standing "circularly polarized" waves in the rope. If you continue to spin at a faster frequency, you can create even more "nodes" in the rope (stable points of ...
• 993