Put Pulleys to the Test

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Put Pulleys to the Test

From the Series Searchlight Books ™ — How Do Simple Machines Work?

What do flagpoles and some window blinds have in common? They use pulleys to perform work! Pulleys are simple machines. They help us to do jobs more easily. But don't take our word for it… Read More →

  • Lexile: 510
  • Dewey: 621.8