Date: Fri, 07 Sep 2001 14:07:11 -0500 (CDT)

Author: Dale Stille

Subject: Re: 1D60.20 -- A second opinion

Post:


Jerry, Chele, Paul, Dick, Doug, and Steve,

Duh!! I should have sent you to www.physics.uiowa.edu for a picture of the
apparatus. I'll try to answer the questions posed so far.

Jerry.....by adjusting the height.....all I'm trying to do is make sure
that the shaft will hit the cube in the exact center. One of the cubes
drops directly off the shaft and the other is kicked off the apparatus
platform. As for rotating the shaft, the only way to do this is to
unsolder the trigger arm from the shaft and I'm not quite that desperate
yet.

Chele.....Yes the apparatus and the table are parallel to each other. My
apparatus has a level on it and I use a level on the table to set them the
same.

Paul.....My cubes are on the order of 19 grams. I don't think the air
resistance should affect them that greatly in the short distance I let
them drop ( approx. 1 meter ). I was thinking the spin may have an
effect, much like the bullet shooting into the block problem that was
presented in TPT this past year. I like your suggestion to check the takeoff
time....the more I think about it, the more I think that this may be my
problem. Thanks

Dick......Sorry, no tilt relative the the table. I wish it were that
simple. My app. looks much like the one in your video except your
platform is metal and mine is a wooden block.

Doug....I'll double check, but I'm sure that they both start at the same
height relative to my platform and also to my table.

Steve......Good suggestion, but sorry, been there and done that. Tried a
wide variety of camera's both digital and tube, video and still, with the
same consistent results.


Thanks for the suggestions,
Dale
U of Iowa







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