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  1. THATS AWESOME! So basically just keep your hands above it until it starts
    spinning? I guess the dimples does something with the lift and all

  2. my science teacher used to do that with a pingpong ball.. except he just
    blow with his mouth straight upwards

  3. he should have used a ball with a design or a line on the ball so we could
    see the spinning better

  4. you can do it with an air hose from a compressor. just hold it straight up
    then tilt it to the side slowly.

  5. i hate to act like a know it all, but you can do this with any ball. the
    high velocity of air creates a low pressure steam of air, which means that
    the surrounding air is a high pressure system that would trap any object.
    it’s called Bernoulli’s principle. the ball isn’t “resting on a stream of
    air” at all.

  6. haha no way dude. because the balls is round and symetrical, the air
    slowing around it creates equal areas of low pressure all around. forces
    are equal therefore ball does not move. air pushing ball is greater than
    the force of gravity. thus the ball does not fall. the wheel thing you are
    talking about is called gyroscopic precession.

  7. rhombus1000: Wrong, this is an entirely different effect. when blowing
    upward you are counting on the air to create the lift needed to keep it
    afloat. Everyone knows you can do this. What he is showing is that you can
    cause the ball itself to create lift and overcome drag by spinning so
    quickly it actually floats in place with a 200 mph wind underneath it (not
    pointing up but forward). Does this make sense now?

  8. it creates backspin on the ball which generates lift, physics teacher has
    done this. another cool thing is to attach a rope to one side of the hub on
    a bicycle wheel, spin the wheel while it is horizontal then lift up on the
    rope and the tire will spin vertically being held up only on the one side,
    if you have done it you know what i am talking about

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