Use the information below to generate a citation. Then you must include on every digital page view the following attribution: If you are redistributing all or part of this book in a digital format, Then you must include on every physical page the following attribution: If you are redistributing all or part of this book in a print format, Changes were made to the original material, including updates to art, structure, and other content updates. Want to cite, share, or modify this book? This book uses theĪnd you must attribute Texas Education Agency (TEA). You can calculate the elapsed time or the change in time, Δ t Δ t, of motion as the difference between the ending time and the beginning time Because speed is a rate, it depends on the time interval of motion. Like distance, speed is a scalar because it has a magnitude but not a direction. Speed is the rate at which an object changes its location. In this section we will look at time, speed, and velocity to expand our understanding of motion.Ī description of how fast or slow an object moves is its speed. Questions such as, “How long does a foot race take?” and “What was the runner’s speed?” cannot be answered without an understanding of other concepts. There is more to motion than distance and displacement. After they share their ideas, follow up with questions that deepen their thought process, such as: Why do you think that? What is an example? How might apply these terms to motion that you see every day? Speed Ask them to speculate about ways that speed is different from velocity. Explain to students that velocity, like displacement, is a vector quantity. Tell students that they will learn about these differences as they read the section. ![]() Explain that these words are often used interchangeably in everyday life, but their scientific definitions are different. Then ask them if they have heard the word velocity used. Before students read the section, ask them to give examples of ways they have heard the word speed used. Calculations become efficient with this tool as it eliminates the error risks if any. It also computes various other parameters that are related to acceleration. In this section, students will apply what they have learned about distance and displacement to the concepts of speed and velocity. Use this acceleration calculator to calculate velocity change of an object that is changing with respect to time.
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