Simple Machines: Wheels, Levers, and Pulleys

How many simple machines do you use every day? Probably more than you realize!

Machines make work easier— helping break things apart, lift heavy objects, and change the power and direction of force applied to them. In this accessible picture book, celebrated nonfiction author David A. Adler outlines different types of simple machines—wedges, wheels, levers, pulleys, and more—and gives common examples of how we use them every day.

Anna Raff's bright illustrations show how simple machines wor...