Christiansen, Jennifer.

Get to know wedges / Jennifer Christiansen. - New York, NY : Crabtree Pub. Company, c2009. - 32 p. : col. ill. ; 29 cm. - Get to know simple machines .

Includes index.

All people have jobs to do. Some jobs take a lot of energy. Simple machines help people get jobs done without working too hard. There are six kinds of simple machines: inclined planes, levers, pulleys, wedges, screws, and wheels and axles.

ISBN: 0778744701 9780778744870 (pbk.) 0778744876 (pbk.)

LCCN: 2009004902

Subjects--Topical Terms:
Wedges.
Children's literature--2009.

LC Class. No.: TJ1201.W44 / C565 2009

Dewey Class. No.: 621.8