# Bernoulli’s Principle

NASA Activities (source) for Bernoulli’s Principle

Tent with a Straw
 Fold a 20- by 13-cm piece of paper in half to make a tent.
 Place the paper tent on the desk.
 Using a straw, blow under the tent and observe what happens.
 Blow harder and observe what happens.
 Try blowing hard against the side of the tent and observe what happens.

Balloon Blow
 Blow up two balloons and tie off the ends.
 Cut two pieces of string 30 cm each.
 Tie one end of each string to each balloon.
 Hold the balloons in front of you by the strings about 5 cm apart.
 Blow very hard between the two balloons and observe what happens.
 What did the balloons do?

Ping Pong
 Place two ping pong balls on a table about 2 cm apart.
 Using a straw, blow very hard between the two balls and observe what happens.
 Did the balls move closer together or farther apart?

Paper Paper
 Hold two pieces of notebook paper in front of you about 5 cm apart.
 Blow hard between the papers and observe what happens.
 Which way did the papers move?

Stuck to It
 Cut out a square of paper approximately 3 by 3 cm.
 Place the paper in the palm of your hand, and using your thumb and middle finger, hold a quarter (or
nickel) about 1 cm above the paper.
 Place your mouth above the coin and blow hard.
 Observes what happens.

Ball and Straw
 Bend a flexible straw so that the short end is pointing up.
 Hold a ping pong ball over the opening of the straw and blow.
 Let go of the ball and observe what happens.
 What happens if you tilt the straw?