Publisher's Synopsis
Explains the concepts of simple and complex machines and mechanical advantage, and describes how wheels, including gears and ball bearings, work.
Marbles, Roller Skates, Doorknobs Simple Machines That Are Really Wheels - Gateway Simple Machines.
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Book information
| ISBN: | 9781878841452 |
| Publisher: | Millbrook Press |
| Imprint: | Millbrook Press |
| Language: | English |
| Number of pages: | 31 |
| Weight: | -1g |
| Height: | 234mm |
| Width: | 190mm |
| Spine width: | 6mm |
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