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I made ScienceFix.com to share my favorite demos that I do in my middle school science classes.  

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  • Something Funny Happened on the Way to the Moon
    Something Funny Happened on the Way to the Moon
    by Sara Howard
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    NOVA - Origins
    starring Neil Degrasse Tyson
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    Human Body: Pushing the Limits
    starring Bray Poor
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Thursday
May312012

Top Friction

Here on Earth, friction is an unbalanced force that will cause moving objects to negatively accelerate. A top is a classically fun toy that spins for a period of time. Tops stop spinning because of friction forces between the top and the surface it is spinning on (as well as some friction with the air). Using a top that doesn't stop (available at Educational Innovations) and a normal top, this demo offers a discrepant event for students to experience. They know that all tops stop, but don't neccessarily know why, and they will be especially preplexed when they see a top that does not stop spinning. Watch the video to see it in action and to see why it doesn't stop spinning.

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Reader Comments (1)

Great video! Will use this on the first day of school next year to teach about observation and predictions in science. Not sure why the top inverted, will be checking back to see what the answer is!

June 6, 2012 | Unregistered CommenterMrs. Bunker

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