01054cam a2200289 4500 330794902 TxAuBib 19891010120000.0 880405s1988||||||||||||||||||||||||eng|u 88011108 /AC 9780525672531 0525672532 (OCoLC)17952252 DLC DLC OOP TxAuBib Cobb, Vicki. Why doesn't the earth fall up : and other not such dumb questions about motion / by Vicki Cobb ; illustrated by Ted Enik. 1st ed. New York : Lodestar Books, 1988. 40 p. : ill. ; 21 x 23 cm. Includes index. Answers nine questions about motion, explaining Newton's Laws of Motion, gravity, centrifugal force, and other principles of movement. 19910920. Motion Juvenile literature. Force and energy Juvenile literature. Mechanics Juvenile literature. Enik, Ted.