It seems strange that by pulling down you can lift something up, but several simple machines work with a change of direction. Pulleys are one of them. Here is a great video - short, to the point, well illustrated, good explanations.
And funky music!
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Thanks for visiting Mr. W Reads. Feel free to leave a comment or question, and I will respond as quickly as possible. All comments are moderated, so your comment may not appear right away.