Tumbling Toy Physics

Thanks for your reply. Am hoping to find further descriptions presented by you in future. Am having my very inquisitive and intelligent watch your explanations and then we are attempting to build one as learning tool. Thus far we have built the duck and after much trial over center of gravity finally able to get it to work. Having difficulty however with using pvc coupling and two end caps to replicate your deal. Don't have heavy enough steel ball and am unsure where to get one so quest is on.

I'm glad the videos are helping to encourage you to learn and build stuff.

Good luck with the projects,
Dr. Dave

nice presentation. i am currently making this exact toy due to seeing you two days ago demonstrate the physics of it. you noted the piece standing vertically that the two pegs are slightly offset from center vertical axis however, you didn't explain the significance of it. so, i am wondering how much offset and why. please explain.

The pegs are offset from the center-line to enable the internal ball to create an offset impact, allowing the tube to rotate about the peg. The offset is enough, along with the angle of the ramp, to allow the offset impact to create enough angular momentum to have the tube rotate to the next step. I hope that helps.

Congratulations!  this video has a clear explaination and the the amazing slow motion video, really very professional

Thanks.

awesome

cool