An introduction to levers as simple machines. Coverage includes the definition of a first class lever, how a seesaw uses levers and levers in the human body.
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Details
ISBN: 1410914429 (lib. bdg.)
Physical Description:32 pages : color illustrations ; 28 cm.print
Publisher:Chicago, Ill : Raintree, c2005.
Bibliography, etc. Note: Includes bibliographical references (p. 30) and index.