Put Levers to the TestBook - 2012
What do hammers, wheelbarrows, and brooms have in common? All of them are levers! Levers are simple machines. They help us to do jobs more easily. But don't take our word for it. Put levers to the test with the fun experiments you'll find in this book.
Publisher: Minneapolis, MN : Lerner Publications Co., c2012.
Branch Call Number: J 621.8 WA
Characteristics: 40 p. : col. ill. ; 24 cm.