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Spinning Ball

  • A ping pong ball
  • Some string
  • Procedure: Tape the string to the ball. Swing the ball back and forth both with the ball stationary and with the ball spinning.

    Explanation: By spinning the ball, you are creating a secondary flow that moves the stagnation points, giving the ping pong ball a net lift. This lift will cause the plane of the swing to slowly rotate.

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