physics

Showing 197 posts tagged physics

This street vendor makes popcorn with an explosive, pressure-cooking, popcorn cannon contraption, a centuries-old method. The video was filmed in Zhengzhou, China, but we’ve watched videos of this in South Korea, too. And of course, Mythbusters has looked into it, video below. Boom!

Related watching: Click to Enlarge: Popcorn, more explosions, and more videos of street vendors, including how this intricately-drawn melted caramel/sugar dragon is made.

via Boing Boing.

Discovered by German physicist Helen Sperl in 1891, popularized in 1950 by Danish engineer Werner Ostberg, and demonstrated here by Grand Illusions' Hendrik Ball, this is a Tippe TopWatch as it spins “at a high angular velocity,” turning itself upside down to spin on its stem. But wait, there’s more

The interesting thing is that when the Tippe Top inverts, it also changes the direction of the rotation! In other words, at some point during the inversion, the top stops spinning around the axis through the stem and then starts to rotate the other way. At the same time, the center of mass is lifted, and the top is thus a quite interesting problem concerning conservation of energy and angular momentum.

There’s more physics and toy videos in the archives, including another from Grand Illusions: the Spiraculum.

A few marble machines are clickity-clacking in our archives, but never have we seen ones that are designed as laser-cut, flat-packed, wood DIY kits! Hopefully on sale soon from RetroTime.org, a hand cranked Kit2 Marble Machine, above, and a hand cranked Modular Marble Machine - Shield no.2, below: 

There are more kit videos on RetroTime’s YouTube channel.

And in our archives: marble machines and Rube Goldberg machines, including the increasingly-difficult-to-find-on-the-internet Pitagora Suitchi.

via The Awesomer.

Using nothing but LEGO components, the team at Brickride builds supercool rollercoasters. The one above: Incredible 100% LEGO Roller Coaster with Corkscrew. Watch a time-lapse of how they put it together.

In the archives, more LEGO and other awesome toy builds: LEGO Great Ball Contraption, DIY paper rollercoasters, amazing marble machinesK’nex Clockwork, and what you can do with a lot of toothpicks.

via The Awesomer.