Vhen we speak of velocity, we usually mean instantaneous velocity, which indicates the speed and irection of an object at a particular moment. The idea of instantaneous velocity makes intuitive sense, but are is required to define it precisely. Consider an object traveling in a straight line (linear motion). The average velocity over a given time nterval has a straightforward definition as the ratio change in position Average Velocity : length of time interval or example, if an automobile travels 200 km in 4 hours, then its average velocity during this 4-hour eriod is 200 = 50 km/h. At any given moment the automobile may be going faster or slower than the 4 verage. Question 2.1 Average Velocity Progress Check What is the average velocity (in kilometers per hour, or km/h) of an automobile that travels 30 km in 20 minutes? A. 90 km/h B. 15 kmh С. 60 km/h Submit Ve cannot define instantaneous velocity as a ratio in the same way because we would have to divide by

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