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Machines in sports
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Machines in sports
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Discusses how six simple machines found in sports, such as an arrowhead, rowing oar, ramp, barbell, and a weight machine can help people do their work.
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Authors
Snow, Caroline
National Geographic Society (U.S.)
Subjects
Simple machines.
Sporting goods.
Science--Study and teaching (Primary).
Language
English
Series
National Geographic theme sets.
Dimensions
25 cm.