Monday, March 09, 2009

Newton's third again

This is a spinning one demonstrating Newton's third law of motion: 'to every action there is an equal and opposite reaction.'

Mine (babes) had to hang on to it and jump from the quarry to see if they could levitate with it (ie using propulsion). :)

First gather up your supplies
Then blow up your balloon to stretch it out a bit

Let it deflate and tape your balloon to the long end of a flexible straw (very near the end).

Find the balance point

Prick your straw with the stickpin at the balance point, and stick the pin and straw into the eraser end of the pencil.
Send your straw spinning manually a few times to loosen the hole so that it will spin easily.

Blow up your balloon
and let it fly!!


  1. Kids and balloons...the perfect combination! I bet they loved this. We will be doing this one, thanks for sharing!

  2. They look like they're enjoying the experiment. :)

  3. That is cool. Where do your experiments come from?

  4. LillyZoo -
    all kinds of places!
    books we own, science websites, library books, sometimes they are variations, and sometimes homeschool websites.


Thanks so much for sharing your thoughts!