Tension in Strings HELP thanks-very simple.

[_Mayday_]

The real question is do you understand it and would you be able to do a similar one again with no help?

 

[physicsbhelp]

and yah , that is why i need so much help on these questions because we don't have books! haha

okay so for part b the answer would be 1.72089Hz

 

[physicsbhelp]

probably not, i need a suggestion for ONE good BOOK for PHysics that is not too expensive.

 

[physicsbhelp]

nvm that part b answer is wrong. i don't get it. wouldn't harmonic=3

 

[_Mayday_]

I would talk to your teacher about it and say that you are looking for a book to help provide a base for your work. If you have solved the whole question mark the thread as solved.

Thread tools > Mark thread as solved

 

[physicsbhelp]

and wouldn't the wavelenth be 3.33333 because L= x*wavelength /2 and L=10 and x=3 so wavelength equal 3.3333333
or do i solve for frequency through finding the velocity which is the square root of Tension/Density

 

[physicsbhelp]

i know how to mark the thread as solved, however we have not finished the problem, there is a part b) it is on the first page of this thread.

 

[physicsbhelp]

right?

 

[physicsbhelp]

mayday or doc al can you help with part b)

 

[Doc Al]

The standing wave pattern on the string segment (whose length is 2m) contains how many wavelengths? Use that to figure out the wavelength.

 

[physicsbhelp]

do you mean i use the equation: (m*wavelength)/d = x/L

 

[physicsbhelp]

right?

 

[Astronuc]

Please refer to these for wave velocity and harmonics

http://hyperphysics.phy-astr.gsu.edu/hbase/waves/string.html#c2

http://www.glenbrook.k12.il.us/GBSSCI/PHYS/Class/sound/u11l4d.html

 

[physicsbhelp]

At what frequency must the string between the pulleys vibrate in order to form the standing-wave pattern shown in Figure b)?


okay astronuc according to your first website this is my answer, is this right? .5736Hz

 

[physicsbhelp]

is this right?

 

[physicsbhelp]

Please Please Please Help! Any Help W/ Part B) Would Be Greatly Appreciated.

 

[Doc Al]

Please look at the links that Astronuc provided. (The second link is the same site I've been linking to.) Both of them will make excellent references for you.

Note that one wavelength = two "loops" (or two anti-nodes). In your problem, you see three loops. If 2 loops equal 1 wavelength, but 3 loops equal 2 m--what must be the wavelength? Set up a ratio and solve for the wavelength.