Beat frequency of turning folk

Discussion in 'Physics' started by mndewa, Feb 11, 2013.

  1. mndewa

    Thread Starter New Member

    Sep 16, 2012
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    a turning folk when sounded with a folk of frequency 256Hz gave 4 beats/second. when small beat of wax was attached to a prong of the folk of unknown frequency 3 beats/seconds were produced.what is the frequency of unknown
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,442
    3,361
    The answer should be obvious.
     
  3. logearav

    Member

    Aug 19, 2011
    248
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    Hi mndewa,
    The frequency should be either 256+4 or 256-4 which means either 260 or 252. On loading with wax, the frequency will decrease. So the frequency of unknown fork is 252. Hope this helps.
     
  4. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    945
    If the freq. of unknown decreases with a wax load, then the answer would be 260 Hz.

    when loaded the freq of unknown became closer to the standard as in 3 beats vs 4 beats unloaded. Therefore the unknown would be higher.
     
    logearav likes this.
  5. logearav

    Member

    Aug 19, 2011
    248
    0
    Yes Kermit2 is correct.
     
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