Simple Machines IV - Wheels and Axles

Fourth graders study everyday examples of simple machines. They examine how the combination of a wheel and axle works more efficiently than either in isolation. In a demonstration lesson, they see how a spring scale shows a force pulling down on an object. Finally, they determine how wheels and axles reduce the force needed to work by reducing the amount of friction.

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Life Science
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Lesson Plans
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Inquiry-Based Learning
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