How to Confuse a Secondary School Student

Introduction: 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.

Be the First to Share

    Recommendations

    • Metalworking Contest

      Metalworking Contest
    • Maps Challenge

      Maps Challenge
    • Tinkercad Student Design Contest

      Tinkercad Student Design Contest

    13 Discussions

    0
    strumbot
    strumbot

    11 years ago on Introduction

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

    0
    Pumpkin$
    Pumpkin$

    12 years ago on Introduction

    not ebay..... probably glencoe science, my teacher has some in a cabinet

    0
    Gamer917
    Gamer917

    Reply 11 years ago on Introduction

    i have 1 and i made a sort of pull-starter for it so it could spin faster

    0
    damasta
    damasta

    12 years ago on Introduction

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