1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

More on fundamental frequency

  1. Jan 6, 2005 #1
    A horizontal string of length 1.5 m vibrates with a wave velocity of 1320 m/s at its fundamental freq.

    a. What is the fund. freq.?

    Do I use the formula f_1 = v/4L?

    b. What is the freq. of the 4th overtone and how many nodes and antinodes will it have?

    To find 4th's freq. use f_n = 4*f_1?

    Since this is 4th overtone, are there 6 nodes and 5 antinodes?

    (assuming for 4th 5 positive crests on basic diagram for all situations)

    c. In terms of interference to what do the nodes and antinodes correspond?

    this is conceptual, right?

    nodes - locations where string appears motionless due to destructive interference

    antinodes - where string has greatest displacement due to constructive displacement.

    d. how many g must string be to have a tension of 10^5 N?

    Just use v = sqrt[F/(m/L)]
     
  2. jcsd
  3. Jan 6, 2005 #2

    Doc Al

    User Avatar

    Staff: Mentor

    No. The general formula is [itex]f_m = m v/2L[/itex].

    The 4th overtone is the 5th harmonic (m = 5 in the above formula).
    Just by accident, this is correct. :smile:

    Right (but that's constructive interference).

    Right.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: More on fundamental frequency
  1. Fundamental frequency (Replies: 2)

  2. Fundamental frequency (Replies: 3)

  3. Fundamental frequency (Replies: 16)

  4. Fundamental Frequency (Replies: 5)

  5. Fundamental Frequency. (Replies: 2)

Loading...