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Results tagged with string
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user 38053
This tag is for non-relativistic material strings, such as, e.g., a guitar string. PLEASE DO NOT USE THIS TAG for relativistic strings and string theory.
2
votes
2
answers
3k
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Rod Falling on Frictionless Surface
A rigid rod with mass $m$ is initially held at an angle with respect to a frictionless plane by a string. Then the string is cut. What happens to the rod? …
- 213k
0
votes
Accepted
Reaction Force on String Wrapped Around Circular Peg
Consider the net torque on the segment of string wrapped around the peg about the peg's centre. … The reaction force the peg exerts on the string at each point is radial, and so does not contribute to this net torque. …
- 425
0
votes
3
answers
2k
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Reaction Force on String Wrapped Around Circular Peg
A massless inextensible string is wrapped around a frictionless circular peg. The string is taut, with tension $T_2$ and $T_1$ at the points where it leaves of the pg as shown. … The section of string wrapped around the peg is in mechanical equilibrium. …
- 425
1
vote
2
answers
486
views
Tension in a massless string as it bends around a concave shape
I understand that tension in a massless string must be the same throughout when the string is straight, to prevent any section of it from accelerating at an infinite rate. … Again as we do not want the section of the string wrapped around a peg to accelerate at an infinite rate, the reaction force of the peg on the string must balance the sum of the tensions on each side. …
