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Um... - oldbloke's mutterings
January 7th, 2011
04:10 pm
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Um...
YB asks why, when you throw a snowball at a wall, the snow sticks to the wall.

I /think/ I know...

(8 comments | Leave a comment)

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From:bopeepsheep
Date:January 7th, 2011 04:51 pm (UTC)
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That sounds like a question that needs some practical hypothesis testing, to me. Do you currently have any snow?

(smallclanger made an impressive snow figure on a stone wall belonging to Christ Church while we were waiting in vain for a bus the Saturday before Christmas. The snow was useless for actual snowmen, being too powdery and light, but it clung to the wall beautifully.)
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From:caramel_betty
Date:January 7th, 2011 04:57 pm (UTC)
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Snowballs are white, very-cold small pieces of velcro.
(Deleted comment)
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From:hooloovoo_42
Date:January 7th, 2011 05:26 pm (UTC)
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Bird poo sticks to walls. Maybe snow is really cold bird poo!
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From:blackberry44
Date:January 7th, 2011 06:39 pm (UTC)
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It has glue in it!
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From:oldbloke
Date:January 7th, 2011 11:25 pm (UTC)
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That's closer to what I believe to be the REAL ANSWER than perhaps you realise
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From:pndc
Date:January 7th, 2011 11:36 pm (UTC)
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I'd hazard that on impact that snowball part-melts and forms into the shape of the wall, then friction takes care of the rest.
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From:oldbloke
Date:January 7th, 2011 11:41 pm (UTC)
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I'm thinking rather than friction, though that will play a part, the part-melt forms a seal against air, so essentially air pressure holds it in place: it's pushed into the wall by air pressure, but never away from it (and it's not heavy enough for gravity to take over)
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