What are the errors in the Pulley experiments?
Friction and you need to include the weight of the pulleys and rope. Also the precision and accuracy of the force and distance meters, (spring scales and rulers.)

Friction and you need to include the weight of the pulleys and rope. Also the precision and accuracy of the force and distance meters, (spring scales and rulers.)
Informal resource video for elementary science teachers based on the Ontario science curriculum unit about pulleys and gears - Grade 4
Enjoy the wonders of 1, 2 and 3 pulleys! Marvel at their strength! Wonder at their power!
Informal resource video for elementary science teachers based on the Ontario science curriculum unit about pulleys and gears - Grade 4
Small kid beats adults with science
woodgears.ca Various video segments showing the progress of my homemade bandsaw. Be sure to check the accompanying article for the full story.
Students across US are so inclined to Angry Birds Rio that they are testing the Physics concepts using soft toy characters of the game. The game leverages from prime concepts of Momentum, Mass transfer, Motion and Velocity. The professors at school and universities have made the case study as part of their curriculum. The questions that must be addressed by the students while performing Angry Birds Experiments include: • Why White bird, Egg Beater, drops its egg the way it does? • What is...
And they're serious! "We plan to drive a dynamo (taken from an old Fiat) through a system of belts and pulleys using cows/cattle"
If you have a MakerBot, then you have the means of production. We want you to take part in our grand experiment in crowdsourced manufacturing. We want you to use your MakerBot to produce the next wave of MakerBots. In essence, we want to distribute pulley manufacturing to you.