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Bending Paper

  • Two books
  • A sheet of paper
  • A straw
  • Procedure: The books are placed on a desk side by side with a space in between them. The paper is placed over both books so that it bridges them. Using a straw, blow air underneath the paper. This causes a downward force on the paper, and it moves down in the center.

    Explanation: By blowing the air between the books, you have an increase in velocity and a decrease in pressure, thus a net downward force on the paper.

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