Put Wheels and Axles to the Test by Sally M., Feldmann, Roseann Walker
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Description
What do bicycles, doorknobs, and screwdrivers have in common? All of them use wheels and axles to perform work! Wheels and axles are simple machines. They help us to do jobs more easily. But dont take our word for it. Put wheels and axles to the test with the fun experiments youll find in this book.
