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Ball in a Hole


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530 replies to this topic

#31 brit

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Posted 25 June 2007 - 05:02 PM

water. you fill the hole with water and the ball floats to the top. come onnn you guys
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#32 ctryan

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Posted 26 June 2007 - 05:09 PM

Pour water in the pipe until the pipe is full....the ball should shoot up due to water displacement.
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#33 Keren

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Posted 26 June 2007 - 08:37 PM

Fill the pipe with water. A tennis ball is full of air and will float on top of the water all the way to the top.
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#34 shynewkoraa

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Posted 27 June 2007 - 03:25 PM

if the pipe is closed @ the bottom, just fill it with watter and the ball will come up
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#35 brs3378

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Posted 27 June 2007 - 05:42 PM

there's another brainteaser like this one, but it's a ping pong ball and you're in a sealed room. in that one, they give you all sorts of items, string, sticks, etc. and ask how do you get it out and i like that solution:

PEE IN THE HOLE!!
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#36 dommisse

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Posted 28 June 2007 - 07:44 AM

I would drink a lot of water and wait to get a real urge to pee. I would then do this into the pipe - causing the ball to rise!
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#37 varadkalia

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Posted 28 June 2007 - 08:24 AM

Fill the hole with water... the ball would pop out of the hole
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#38 mrmogul321

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Posted 28 June 2007 - 07:41 PM

I have an answer that is just as simple, but a little more complex to understand WHY it works. First of all, trying to use a vacuum would not work, because it would require air being able to be added below the ball. BUT< some vacuum cleaners have the options to blow. Or, you coulld use a leaf blower. What you do is direct the air stream perpendicular to the top of the hole. (as if you were blowing a bottle like a musical instrument). Then, the increased speed of the air, will reduce pressure, and the tennis ball will rise! This concept is very similar to why airplanes fly. It creates a pressure gradient, and as you might know, things move from high to low pressure, and therefore, it will travel against gravity! (Thank you AP Physics!)
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#39 gpsatapathy

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Posted 29 June 2007 - 07:32 AM

simple,
Pour water into the Pipe... you will get the solution.
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#40 Patelkunalr

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Posted 29 June 2007 - 08:20 AM

pour the water in the pipe till the ball float up to the surface.
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