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Newton's 3rd Law of Motion


After discussing Newton’s first and second law, we introduce Newton’s third law and use it to compute tension and reaction forces. Having established all three of Newton’s laws, we can apply them in more sophisticated ways. We demonstrate how the key concepts of acceleration, forces, and action-reaction pairs underpinning Newton’s laws can be combined to effectively analyze various systems in multiple representations, from muscles to drag to hopping bugs.

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The Living Physics Portal is an online environment for physics faculty to share and discuss free curricular resources for teaching introductory physics for life sciences (IPLS). The objective of the Portal is to improve the education of the next generation of medical professionals and biologists by making physics classes more relevant for life sciences students.

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