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# A2 Physics C/W Ideas ? watch

1. Hi!

Just starting my physics practical investigation, I've decided to go with "Support of a Ball in a Jet". My basic apparatus are an Air Jet and a Ping-Pong Ball.

I made a jig that the air jet could sit in and decided to measure the height the ball gained at different angles. I measured the air flow to be 19ms. I now realise that the height will not vary from any angle between 90-40 degrees from the horizontal. My problem is what to try and look into now?

I thought about investigating why the ball drops to the floor after a certain angle, i've found this angle to be 38 degrees from the horizontal, unfortunately I don't know why this happens! I'd like some help from users of this board as to why after a certain angle the ball cannot be supported.

Ta for now, I'll post more information after I've completed a few more initial tests, help me people!
2. have you done any research into the bernouilli principle? that would be a good place to start
3. yeah, good suggestion. I've just this minute been looking at bernoulli and drag coefficient. Does the bernouilli principle treat air as a fluid. Faster moving air means less pressure. OK thats something I'll look into more detail. How about drilling small holes in the Ping-Pong Ball, reducing surface area? This should result in a lower height gain.

Can anyone think of other things to consider?
4. anymore ideas lads? and lasses :P
5. :s Help me, need to 1v1 with my teacher and present to the class what I intend to Investigate and find !

/me worries

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Updated: February 10, 2004
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