Forces and Motion

Inseparable Books

Enrichment Activity for 5-11 11-14

What you need

  • Two very similar books, with at least 100 pages each


  1. Carefully, and evenly, interweave the pages of the books son that they overlap to about the middle of the page
  2. Hold the books by the spines and pull!

Results and Explanation

Friction is the force that acts against the motion of two surfaces in contact. The friction between the just two pages is tiny, but with lots of pages in the books, the force becomes very noticeable.

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is a special case of Force
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