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!

Quick physics problem i need help with

  1. Jul 27, 2004 #1
    A sinusoidal wave is travelingh along a rope. The oscillator that generates the wave completes 40.0 vibrations in 30.0s. Also, a given maximum travels 425cm along the rope in 10.0s. What is the wavelength?
  2. jcsd
  3. Jul 27, 2004 #2


    User Avatar
    Science Advisor
    Homework Helper

    The wavelength is (among other things) the distance travelled by a given maximum in one period (one cycle of oscillation). You can find the period given the numbers you have. The period is the time taken for 1 cycle/vibration.

    T = 30.0s/40.0 vibrations = 0.750 seconds/vibration

    = distance travelled/cycle
    = distance travelled/second * seconds/cycle
    = 4.25m/10.0s * 0.750s/cycle
    = 0.31875 m/cycle
    = 0.319 m (you don't really have to say, "/cycle")

    so the wavelength (notice that it's only good to 3 significant digits) is 31.9 cm.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Quick physics problem i need help with