Pulleys help make up some of the most complicated machinery, from car engines to cranes. See how pulleys lift and move heavy things, how pulleys work together, and the different kinds of pulleys. Kids get to use their own pulleys in the fun with pulleys section.

Get to Know Pulleys 2009, Crabtree Publishing Company

ISBN-13: 9780778744689

Hardcover

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Get to Know Pulleys 2009, Crabtree Publishing Company

ISBN-13: 9780778744856

Trade paperback

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