KENTUCKY (7/31/17) Do you have any old phone books?

INGREDIENTS

  • Two Phone Books

INSTRUCTIONS
STEP 1:  Overlap the pages of each phone book. For example, page one of the first phone book should overlap page one of the second phone book.
STEP 2:  Have one person grasp the spine of one phone book, while the other person grasp the spine of the other phone book.
STEP 3:  Attempt to separate the phone books by pulling.
STEP 4:  Have one person apply more force, in a different direction, while attempting to separate the phone books. What are the effects of balanced and unbalanced forces on the phone books?   

EXPLANATION
Because of friction, it is difficult to separate the phone books. Friction is the resistance between two objects. By overlapping all the pages in each phone book, you created a lot of friction.   

Jason Lindsey – Hooked on Science

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