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# Guitar physics question dealing with frequency/ tension watch

1. A guitar string has an original tension of 146 N. How would the tension have to change to have the string vibrate with a frequency of 292 Hz? (By the way I understand that frequency is proportional to the sq root of tension, I just have no idea how to approach it seeing as there are only two givens, I cannot seem to understand it). Thanks for any help in advance, I appreciate it
2. (Original post by alexj987)
A guitar string has an original tension of 146 N. How would the tension have to change to have the string vibrate with a frequency of 292 Hz? (By the way I understand that frequency is proportional to the sq root of tension, I just have no idea how to approach it seeing as there are only two givens, I cannot seem to understand it). Thanks for any help in advance, I appreciate it

Welcome to TSR's physics forum.

There is insufficient information to do this question.
You need to know the frequency of the string with 146N tension.

Is this the complete question or was there another part?
The strings on a guitar are tuned to particular frequencies. Was there any information about which string it was?
3. That is the complete question sadly..
4. (Original post by alexj987)
That is the complete question sadly..
have you got a mark scheme you're working to?

Only thing that occurs to me is that it might have been supposed to 'an A' string (220 hz), but the question got mangled by microsoft grammar checker or something

A's a good note for physics questions because afaik it's always a round number of hz and none of the other notes are.

You might as well solve it for 220 or some other number for practice and assume that any real exam questions will have been checked properly.
5. I tend to agree with Joinedup on this. It looks like the question has been mangled at some point.

BTW (I looked this up)
The strings on a guitar are tuned (to nearest whole number) in Hz
E 82
A 110
D 147
G 196
B 247
E 330

http://ffden-2.phys.uaf.edu/211.web....ngton/main.htm

So it could have been slackening off the B string or (probably most uncomfortably) tightening your G string.

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