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Engineer
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Block & Tackle
Item #6. Make and show how a block and tackle works.
Ahead of time, gather together the materials to make to thread spool block and
tackle. Yes it really works. You might also want to obtain a couple double or
triple blocks from the hardware store, so you can clearly demonstrate the ratios,
of rollers to weight that can be lifted, and weight that can be lifted and distance
versus the distance the rope is pulled.
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