Learn about Pulleys
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BrainPop Jr. - Pulleys Sid the Science Kid - Pulleys
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Part 1Part 3Part 5 |
Part 2Part 4 |
http://www.pbslearningmedia.org/resource/51f2f86a-6db9-4c68-b6bc-1b8065f66921/51f2f86a-6db9-4c68-b6bc-1b8065f66921/