How To Make A Pendulum Wave (Science Experiment / Physics Toy)

440,572
0
Published 2017-06-20
For this project I show how to make make a pendulum wave, an interesting science/physics experiment where a series of pendulums is measured so that each one moves slightly faster than the one before it. If measured correctly the pendulums converge to form a variety of patterns on a repeating cycle.

Here are the measurements I used, starting with the longest pendulum and moving toward the shortest: 230mm, 211mm, 196mm, 183mm, 170mm, 159mm, 149mm, 140mm, 131mm, 124mm, 117mm, 110mm, 105mm, 99mm, 94mm, 89mm

Using the equation in the video you can make a pendulum wave of any size by replacing the variable 'L' with the desired length of your longest pendulum when calculating the variable 'K'. Once K has been determined for that starting length Just replace the variable 'n' with the number 2 through however many more pendulums you would like in the series and calculate L for each of them.

I found the equation for calculating pendulum lengths on this page: www.education.com/science-fair/article/pendulum-wa…

A big part of how I've been able to keep making videos on YouTube over the last year is thanks to Patreon supporters. If you enjoy these projects please consider contributing on Patreon and you'll get some other cool stuff like early access to videos. Most of all your support will mean I don't have to rely on the volatile YouTube ecosystem to keep this channel afloat, and new videos will be assured no matter how bad YouTube messes things up in the future. My page: www.patreon.com/NightHawkProjects

Special thanks to my top Patrons! Syniurge, Matthew Leitzke, & TheBackyardScientist!

Music: Marsbeing - Dew
   • Marsbeing - Dew [Silk Music]   (Provided by Silk Music)

All Comments (21)
  • @Ceridewn
    I stumbled acrossed one of your videos the other day, and can't stop watching them. I loved science as a kid, but my high school teachers sucked the fun out of it with not wanting to help explain anything and just moving on. I love how you actually want to teach how these things are done, and explain everything in detail. It makes it so easy to understand. Keep doing everything you are doing, you're amazing.
  • @Nerdforge
    I enjoyed it! Great video, always an inspiration :)
  • @martas9283
    Love it! I'm working on a golf-ball version and the wave so far is not quite what it should be. Now I can at least check the pendulum lengths with a formula. I really like the use of hex nuts for weights. Their open shape gives the wave an even better visual effect, plus the whole structure will be a lot lighter and portable
  • @rolliebca
    Cool pendulum wave. Nice build, explanation, and thanks for the math formula behind it. Always look forward to seeing your videos!
  • @spacetalks5204
    I also made same model by seeing this video. I got first prize in my science fair.
  • @Makebuildmodify
    Thank you for the great explanation! I've wanted to make one of these for a while now.
  • @DoorReformed
    Great video as usual, glad to see your still climbing in subs after the 1mil.
  • @2by4music
    Thank you for the beautiful demonstration and for providing great instructions including the formula for determining cord lengths. I saw another video with each pendulum being one of six colours in sequence (red, orange, yellow, green, blue, purple), and it looked really cool. I'm wondering if there's a reason six colours worked so well, or if any number of colours would produce as stunning patterns. Maybe I should test it out...
  • @taylorsyme2118
    Despite all the negative comments, I thought it was a verry cool interesting video to watch like all of yours and I loved it . Keep doing what you love man ! I hope you might get to read my comment :)
  • Really love the pendulum. I agree it might be a little hard to figure the numbers if you're very young but there are some young children that are gifted that could take this steps further. Have you thought about making it a continuous swinging pendulum by adding an electromagnet system to fluctuate during it swaying back and forth? That would be a great project.
  • @daneekaplan4284
    I love this project. It is gorgeous and you broke down the steps in to something most people should be able to accomplish
  • @karimlel4201
    Awsome vid mate! Love it, i really like these woodworking projects you've been putting out lately :D
  • @FencerforJesus
    I just started teaching physics and today I had my kids do a short lab with Newton's Cradle. At the same time as preparing that, I saw a video on this and while I won't be able to put it together for this year, I'd certainly give it a shot to be ready for next year. Good instruction and tips.
  • Thank you so much for your excellent video. I am currently working on a 4'3x5' pendulum wave, and I certainly could not have tackled the math without your help.
  • @mortdepie1698
    this project was cool to build. thanks nighthawkinlight! I suggest giving this a try it's really satisfying.
  • @NguyenHoa-er1ff
    It's so beautiful and meticulously done :), thanks for your sharing and keep up with your good work !
  • Great project! Did any kind of wave pattern occur when you first put the nuts in a linear slant?
  • @StupidEngineer
    wow amazing. first time I see that it's surprised me. good job, keep it up bro.
  • @Mattzz88
    That is so cool and I loved the way that you explained the equation, it looked difficult until you fleshed it out.