How to build a magic rollback can - Short Version

NOTE: This is the short, 'better' version of this video. But for a more detailed version which includes a narration, check out: http://www.youtube.com/watch?v=LSzr4zX_RG8

The rollback can is a simple and fun toy. Give it a push and it rolls right back to you! Learn how to build your own in only a few minutes with readily available household items.
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How it works:
The weight pulls down on the rubber band. As the can, rolls, the rubber band becomes twisted and stores energy. The more it rolls, the more energy is stored, all the while slowing down the can. When it stops, the energy stored in the rubber band gets transfered back to the can. And that's why it rolls back.

You can also try shaking the can in a circular motion to that the rubber band becomes twisted, and then letting it roll.
If your design is good enough, it might even roll up hill!

Comment, rate, share and enjoy!

Category:

Howto & Style

Tags:

• yt:stretch=16:9
• rollback toy
• science
• do it yourself

[cjchico]

doesn't work jerk!

[MrTonyeverest]

That's a fun video, would certainly keep the kids happy !

Take a look at TONY EVEREST - KINETIC ENERGY MAGIC that deals with nuts

and bolts that move on their own.

You'll probably have to go on TONY EVEREST RINGS UP and search from

there.

[OhioStateFan69]

First comment ohh yea I made that in science class before