All physicsfun toys

Hexacon and Sphericon Rollers

Get these and other amazing developable rollers here:

From Etsy: BUY NOW: Hexacon and Sphericon Rollers

Hexacon Roller: beautiful 3D printed versions of a recent mathematical discovery of new developable rollers (objects that roll where every point on the roller’s surface comes into contact with the plane upon which it rolls). Similar to the sphericon (based on a square) the hexacon rolls in a straight line with a peculiar wobble motion but has a hexagonal cross section (swipe to see video loop of each in motion). The hexacon (2019) and sphericon (1980) are two of a family of such rollers called polycons discovered by David Hirsch, and described in a paper by Hirsch and Seaton published in January of this year. 

Precession of a Gyroscope

Get one here: 
From Amazon: BUY NOW Gyroscopes 
From eBay: BUY NOW Gyroscopes 

Precession of a Gyroscope: in defiance of gravity this gyroscope is supported only at one end. The physics and vector nature of angular momentum! Note that as friction slows the rotor of the gyroscope down, the precession rotation rate gets faster and faster. After some energy loss the gyroscope contacts the table and vibrations move the unit around while the angular momentum maintains its orientation. 


Magnetic Top and Snake

Available in a variety of styles: 
From eBay: BUY NOW Magnetic Top and Snake 
From Amazon: BUY NOW Magnetic Top and Snake 

Magnetic Top and Snake: the magnetic tipped top stays on the perimeter of the steel snake, but since the top has much more mass, the snake moves the most, slithering to and fro. This vintage top and snake came as a give away toy for kids flying on Western Airlines- a kinetic art toy that has been around for decades and takes advantage of Newton's 3rd law and rotational kinetic energy.

Precision Tippe Top

Get a flip over tippe-top here:   

STEMcell Science Shop: BUY NOW Tippe-Tops 

Precision Tippe-Top: spinning things often have surprising physics! This aluminum version of the famous flip-over top works better than any I’ve seen. Friction with the desk surface provides a torque that acts on the existing angular momentum of the top to flip it over. The top will stay flipped until the spin rate slows down enough to where its center of mass pulls it back to the resting position.

Kinetic Boom Op Art

This wonderful piece is available from the artist here: 

From Rafael ParraToro: BUY NOW: Kinetic Boom 

Kinetic Boom!- a spectacular Moire╠ü kinetic art piece by artist/engineer/innovator Rafael Parra-Toro @parratoro which creates motion animation using the barrier-grid technique on a slab of acrylic. Stripes on the front form effects of constructive and deconstructive interference with the interlaced colorful image printed on the back to create motion as the viewer’s perspective changes. A turntable display (swipe for vid) reveals the animation with a continuous and fluid interpretation. A wonderful addition to my collection of kinetic art. 

Get the inexpensive turntable here:
From Amazon: BUY NOW: Display Turntable

 


Andrew's Space Wheel

This vintage 1970s item available now on eBay 
From eBay: BUY NOW Andrews Space Wheel 

Andrew's Space Wheel: kinetic art desk toy from the 70s- the rotor will stay in motion for weeks, until the hidden 9V battery is depleted. The rotor has a magnet at the end of each spoke- a coil and circuit identical to that of the "Top Secret" mystery top that I've posted about gives these magnets a push as the rotor passes through the middle- conservation of energy and angular momentum does the rest! 

Scale Solar System Sticker Set

Get this fantastic set here:

From TheCuriosityBox: BUY NOW: Scale Solar System

Scale Solar System Sticker Set: one of the most amazing facts about the planets in our solar system is their relative sizes. Finally! a set of stickers- made to scale- using images from NASA, brought to you by the Vsauce team @thecuriositybox. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and dwarf planet Pluto included for comparison- all in their current order (sometimes Pluto is closer than Neptune), and mounted here on a sheet of polycarbonate.

Ferrofluid Magnetic Tree Sculpture

Choose from black, blue, or gold ferrofluid: 
Available on Etsy: BUY NOW Nano Tree Ferrofluid Sculpture 

Ferrofluid Magnetic Tree Sculpture: the 'Nano Tree' by Concept Zero designs using gold colored ferrofluid which can be manipulated with a handheld magnet. The spiky structure is due to the balance between the forces from the focused magnetic fields (from a neodymium magnet in the base connected to an iron rich bolt) and the forces from liquid surface tension on the colloidal ferromagnetic liquid. 


Dudeney's Dissection 3D Print

Get this set here!

From Etsy: BUY NOW: Dudeney's Dissection 3D Print

Dudeney's Dissection: an equilateral triangle canbe cut (dissected) into four pieces that will then assemble into a square. This 3D printed version comes as a puzzle- fit the pieces in each of two containers- a square and a triangle, which also makes it clear the two supplied shapes are of equal area. Fun fact: It is not known if a similar three piece dissection is possible. Also called Haberdasher's problem and described in 1907 by Henry Dudeney it is the only 4 piece solution known.

STORY Clock

This very high-tech clock is also high end (more expensive than most items I feature), with excellent craftmaship and technology that is clearly hard to replicate so that it is only made by, and available from, the FLYTE team:

From eBay: BUY NOW: Story Clock

From FLYTE: BUY NOW: US & Global Sales Story Clock or in EU Story Clock

STORY Clock: a spherical magnet hovers one centimeter from the face of this amazing clock and orbits in a circle to indicate the time- for this video I selected an orbit period of 40 seconds to show off the motion. The orbit of the magnetic ball can be set to any period but also has default selectable presets to indicate the current hour, minute, or second. This kind of levitation uses a control system with adjustable electromagnet coils in a feedback loop with Hall effect sensors which allow for fine tuning of a magnetic field to precisely balance the pull of gravity. Amazing magnetic levitation physics demonstrated by clever engineering by the @flyte.se team, this clock will work lying flat or hung on a wall vertically!