Describes many different kinds, uses, and benefits of pulleys. Provides examples of pulleys by showing a flagpole, a ski lift, a crane, and a drawbridge.
About the Author
Michael Dahl is the prolific author of the bestselling Goodnight, Baseball picture book and more than 200 other books for children and young adults. He has won the AEP Distinguished Achievement Award three times for his nonfiction, a Teacher’s Choice award from Learning magazine, and a Seal of Excellence from the Creative Child Awards. Dahl currently lives in Minneapolis, Minnesota.
Table of Contents
Maquinas Que es una polea? Sistemas de poleas Polea fija individual Polea movible individual Poleas en accion Mas de una roldana Aparejo de poleas Gruas.