Christiansen, Jennifer.

Get to know inclined planes / by 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: 0778744663 9780778744832 (pbk.) 0778744833 (pbk.) 9780778744665

LCCN: 2009003874

Subjects--Topical Terms:
Inclined planes.
Children's literature--2010.

LC Class. No.: TJ147 / .C534 2009

Dewey Class. No.: 621.8