1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: What is the speed of a wave on the string?

  1. Nov 23, 2016 #1
    1. The problem statement, all variables and given/known data
    The tension in the string is 90N; the string is 60cm long and has a weight of 34.44g. What is the speed of the wave on the string?
    Answer: 396 m/s

    2. Relevant equations
    v = √ T / (m/L)

    3. The attempt at a solution

    v = √ 90N / (0.0344kg/0.6m)
    v = 39.6 m/s

    Huh? This looks like it should be pretty simple, plug in and get the answers....
    What am I doing wrong, i need one more digit!!??
  2. jcsd
  3. Nov 23, 2016 #2
    Your solution looks correct to me.

    I once had a physics teacher who would dig through the questions and solutions so he could assign all of the ones that were wrong. A lot to be learned that way (like which professor never to sign up for again!)
  4. Nov 24, 2016 #3
    The answer is 39.62 m/s, there must be a mistake in the given or answer!! check you prof.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted