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Rollerblades, bikes, and cars have wheels and axles that help you get from one place to another quickly. Read Wheels and Axles to the Rescue to learn what wheels and axles are, how they work, and how these simple machines can save the day.
Table of Contents
A helpful wheel and axle Work it A wheel and axle in time What would we do without wheels and axles? Working together Wheels and axles everywhere.