Week Thirty Nine Solutions -- Perfect Pulleys

Noah (7) and his mom Nathalie built this contraption using 1 wire hanger, 1 wooden spool, some string and a paperclip. Noah used it to pull up a LEGO building. You should be proud of your work Noah! Magnificent job!







Working off the above diagram, Zee constructed his pulley using the following materials:

2 empty ribbon spools
6 yards of ribbon PLUS extra yarn
wire/pipe cleaners
basket
willing penguin rider

Here are two other amazings views. Zee tried many "passengers" from penguins, to water bottles, to rocks, to test the integrity of the system. After weighing each item, he found out that the maximum weight capacity for the basket, before it broke, was somewhere between 4-5 pounds. The pulley itself, however, remained in good shape! Congratulations Zee! Another perfect pulley.




Just in: a super solution from Maya:

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.