How to Confuse a Secondary School Student

Intro: How to Confuse a Secondary School Student

A rattleback, also known as an "anagyre", "celt", "Celtic stone", "rattlerock", "spin bar", "wobble stone" or "wobblestone" and by the product names "ARK," "Bizzaro Swirls," "RATTLEBACKS," "Space Pet" and "Space Toy," is a semi-ellipsoidal top which will spin on its axis in a preferred direction. But, if spun in the opposite direction, it becomes unstable, "rattles", stops and reverses its spin to the preferred direction. This spin-reversal motion seems, at first sight, to violate the angular-momentum conservation law of physics. Moreover, for most rattlebacks, the motion will happen when the rattleback is spun in one direction, but not when spun in the other. These two peculiarities make the rattleback a physical curiosity that has excited human imagination since prehistorical times.

Share

    Recommendations

    • Audio Contest 2018

      Audio Contest 2018
    • Tiny Home Contest

      Tiny Home Contest
    • Metalworking Contest

      Metalworking Contest

    13 Discussions

    0
    None
    strumbot

    9 years ago on Introduction

    it wobbles because the axis is formed skew of the center line

    0
    None
    damasta

    10 years ago on Introduction

    nice levitating pen/tops (I don't know) in the background