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Desperately Need Help, Wave question

  1. Dec 10, 2005 #1
    I could not figure out this question for hw, and it's due in like 5 hours, please someone help me.......

    At time t = 0, consider a 1/2 wavelength long section of the rope which is carrying the wave y = 0.04 cos(3.1 t - 3.5 x) between two points which have zero displacement (y = 0). Find the total force exerted by the rest of the rope on this section. Neglect any effects due to the weight of the rope. Use the small-angle approximation where q, sin(q), and tan(q) are all approximately equal to each other. Length of the rope is 5m and has mass of 1.5kg.
     
  2. jcsd
  3. Dec 10, 2005 #2
    what have you done so far?
     
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