![]() ![]() Difference Between Distance and Displacement.We will see how to measure speed on the following sections The SI unit of speed or speed is measured in meters per second (m/s) but speed measurement in daily life is done in Kilometer per hour (Km/s) or miles per hour (mph) is used. If they are able to maintain the measurement of speed constant through a journey of half an hour then body A has covered a distance of 10kms whereas Body B has covered only a distance of 5kms. suppose body A has a speed of 20 Km/hr and body B has 10km/hr. Speed meaning in physics is defined as how much distance a body covers in unit interval of time, if it is said that a body A has a higher measurement of speed than a body B then it indicates that the body A covers more distance than the body B in the same interval of time. That is the velocity has two parts one indicating a measure or the magnitude and the other indicating the direction of the velocity, it is not necessary that both these magnitude and direction components of velocity should remain the same always, change in any of these with respect to the time is called as the acceleration of the body. Measurement of speed is the rate of change of distance to time whereas the velocity of a body indicates the rate of change of displacement to time. What is the Measurement of speed and velocity? ![]() In the case of displacement, magnitude and direction is important as it is vector quantity. The distance can only be a positive value or it has to be zero whereas the displacement of a body can be positive negative or zero. The term displacement is a vector quantity and the displacement of a body is used to calculate the velocity of the body which is the rate of change of displacement with respect to time. Whereas the term displacement indicates the shortest route between the initial and the final positions of the body. © Texas Education Agency (TEA).Measurement of speed in the computer is measured in terms of Kilobyte per second (KBps) Distance and displacementĭistance refers to the measure of the entire route travelled by an object and it is a scalar quantity, distance is the measurement that is used to measure the speed of an object. We recommend using aĪuthors: Paul Peter Urone, Roger Hinrichs 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. In this section, students will apply what they have learned about distance and displacement to the concepts of speed and velocity. ![]()
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