Thursday, May 21, 2009

Week ThirtyNine-- Pulleys

This week, experiment with making a pulley using your choice of the following materials:

wire coat hanger
wooden spool(s)
cardboard tube(s)
wire
paperclips
string


Then, see how much you can lift with it! Again, this is a great one to videotape!

If you want to learn more, this is a good starting place.

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