# january 2010 aqa a level physics unit 2 paper question 4b) ??Watch

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#1
Hiii, can someone please explain question 4b.) in january the 2010 aqa unit 2 physics paper, like do I add a node at bridge A or ... much thanks o
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4 years ago
#2
(Original post by aurora light)
Hiii, can someone please explain question 4b.) in january the 2010 aqa unit 2 physics paper, like do I add a node at bridge A or ... much thanks o
I've moved this over to the Study Help forum for you, so you can get some more help with this!
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#3
Thank you
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4 years ago
#4
Right ill just paste this in so others can help rather than having to go to the aqa website

While tuning the guitar, the guitarist produces an overtone that has a node 0.16 m frombridge A
On Figure 5

, sketch the stationary wave produced and label all nodes that are
present.

) (ii) Calculate the frequency of the overtone.
c) The guitarist needs to raise the fundamental frequency of vibration of this string.State one way in which this can be achieved.

In regards to part one you are told that there is a node 0.16m from the start of the string (where the 0.16m line is on the diagram) hence you need nodes at that distance apart throughout the string with anti-nodes in between.

Part 2 - You know the wave length so can use f=wavespeed/lambda
Part 3 - To increase frequency in any situation you have to decrease wavelength and hence the musician would have to make the string tigher/shorter

Hope this helped
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