A doctor leaves her house and walks along the sidewalk towards the hospital. After 3mins, it starts to rain and finds shelter before returning home. Her distance from her house as a function of time is show in the figure below. At what moment in time is her velocity constant and negative? A. t= 1min B. t= 5min C. t= 4min D. t= 7min

Q: How fast is the ball right before it strikes the ground?

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Q: What is the average velocity of the toy car from t = 15 s to t = 35 s?

A: At t = 15 sec , x = 4m At t = 35 sec , x = 2m Now, Vavg = ∆x/t = (2-4)/(35-15) Vavg = - 0.1 m/s

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Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –