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Why Doesn't the Earth Fall Up?
Vicki Cobb
Hardcover (Dutton Books for Young Readers, Jan. 12, 1989)Answers nine questions about motion, explaining Newton's Laws of Motion, gravity, centrifugal force, and other principles of movement.
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Cobb V. & Enik T. : Why Doesn'T the Earth Fall up?
Vicki Cobb
Hardcover (Penguin Books Ltd, March 15, 1761)None