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Questions Q 3 Page 102 - What does the odometer of an automobile measure? View Answer Q 5 Page 102 - A driver of a car travelling at 52 km h–1 applies the brakes and accelerates uniformly in the opposite direction. The car stops in 5 s. Another driver going at 3 km h–1 in another car applies his brakes slowly and stops in 10 s. On the same graph paper, plot the speed versus time graphs for the two cars. Which of the two cars travelled farther after the brakes were applied? View Answer Speed isn't only about numbers; it's a change in movement itself. Like other measurable quantity speed also has its advantages. So, join us on the journey to uncover the hidden art of measuring speed . Further in this article, we will learn about the statement, formula, its dimensional formula, various types, measurement of speed , various instruments for measurement of speed , velocity, and difference between velocity and speed . Additionally, there will be a few practice problems for better ... The SI unit of speed is the meter per second. The other units used to measure speed is Kilometers per hour, miles per hour. The energy which travels at fastest speed is the speed of light in a vacuum i,e c = 299,792,458 meters per second Mathematically speed can be represented as, Speed is a fundamental concept in physics that describes how quickly an object moves from one point to another. It measures the rate at which distance is covered over time. Read further to know the definition, types and applications of the concept of Speed in Physics.