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Science City in Kansas City has some nice pulley chairs that work well.

I think Nauticus in VA (Norfolk?) has an exhibit where a VW bug is being
lifted up, if I remember correctly.  I'm trying to remember if guests
could use the pulley to lift it, or if it's just shown being lifted.
I'll look back through my pictures and see if I can remember it more
clearly.

Also, Discovery Place in Charlotte had some very nice levers in their
mechanical exhibit area a few years ago - you might check there.

Best
Cricket

Cricket Brooks | Project Manager

 

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-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]] On Behalf Of Bill Watson
Sent: Monday, November 05, 2007 11:18 AM
To: [log in to unmask]
Subject: pulley/lever exhibits

ISEN-ASTC-L is a service of the Association of Science-Technology
Centers
Incorporated, a worldwide network of science museums and related
institutions.
************************************************************************
*****

Hi, all - 

If your institution (or an institution you know or have visited) has
either of the following types of exhibits, would you please email me
off-list ([log in to unmask]) to let me know? 

1) A "giant pulley" exhibit - the kind where visitors sit on a series of
chairs (usually 2 or 3), each of which has a pulley system of a
different mechanical advantage (i.e., different numbers of
pulleys/ropes), and try to pull themselves toward the ceiling using the
pulley systems. 

2) A "giant lever" exhibit - a) The first-class lever kind, in which a
heavy load is placed on one end of the lever, and ropes of varying
distance from the fulcrum are placed on the other OR b) The
second(?)-class lever kind, in which the fulcrum is on the floor and 2
ropes are attached on a lever extending toward the ceiling at different
distances from the fulcrum. (When I've seen visitors use this exhibit,
it's often been as a "tug-of-war".)

Thanks, 

Bill

Bill Watson
Research Assistant, SCALE-uP
Doctoral Candidate, Curriculum & Instruction
The George Washington University
(202) 994-1171
www.gwu.edu/~scale-up

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