Physics Help Forum Waves

 General Physics General Physics Help Forum

 Oct 3rd 2018, 03:58 PM #1 Junior Member   Join Date: Sep 2018 Posts: 2 Waves Home work question If you wave a rope hanging from a long vertical distance with a constant frequency, what will happen to the frequency and wave length farter up the rope. I think the velocity of the wave will decrease due to gravity so the frequency and wavelength would also decrease. Is my answer correct or am I missing something?
 Oct 4th 2018, 04:24 AM #2 Senior Member   Join Date: Oct 2017 Location: Glasgow Posts: 277 There are relationships between variables relevant for the oscillation of a rope (such as frequency) and the properties of the object that is oscillating (such as length and tension). If you look up the formulae online and write them down, you can use them to indicate how the other variables change if the length changes.
Oct 5th 2018, 02:55 AM   #3
Senior Member

Join Date: Aug 2010
Posts: 384
 Originally Posted by beastbaws Home work question If you wave a rope hanging from a long vertical distance with a constant frequency, what will happen to the frequency and wave length farter up the rope. I think the velocity of the wave will decrease due to gravity so the frequency and wavelength would also decrease. Is my answer correct or am I missing something?
"frequency" and "wave length" are reciprocal- if one decreases the other increases. They cannot both decrease.

 Oct 5th 2018, 06:29 AM #4 Senior Member     Join Date: Jun 2016 Location: England Posts: 703 Hi Halls, You are of course correct the wavelength and frequency are inversely related, however the constant of proportionality is the speed of propagation of the wave. So by changing the speed of propagation it is possible to reduce both the frequency and the wavelength However, I don't think this will be of any significance to the original problem. I would guess that the key issue would probably be the tension. __________________ ~\o/~

 Tags waves

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post timemachine2 Light and Optics 0 May 1st 2016 01:34 AM timemachine2 Light and Optics 0 Apr 30th 2016 09:11 PM noabsortion1 Light and Optics 0 Apr 27th 2016 08:57 PM Manas Light and Optics 1 Jun 17th 2010 06:50 AM Willy99 Advanced Electricity and Magnetism 1 Nov 22nd 2009 12:19 AM