What is true about her average speed and her average velocity?

Emily jogs 3 laps at the track to warm up. She jogs at 5 mph. Then she runs 3 more laps at 7 mph. What is true about her average speed and her average velocity?





A. Her average speed is smaller than her average velocity.


B. Her average speed and her average velocity are the same.


C. Her average speed is greater than her average velocity.


D. Her average speed is zero, but her average velocity is not.|||Just remember that velocity shows direction with negative values symbolizing opposite direction!





Imagine an overhead view of the circular/semi-circular track has an xy coordinate drawn over it:


Going around a track, she jogs and runs to the right and upward (positive velocity) as much as she does to the left and downwards (negative velocity) so her average velocity is really 0!





Speed cannot be negative, so the average speed is certainly a value greater than zero, as ANY speed is either positive or zero.


(Because of what the question asks, you don't need to figure out the exact average speed)





any positive number is greater than zero, so that answer is C.)|||The answerer is wrong. Velocity is the exact same thing as speed so it'd be B.. I think he was thinking of acceleration perhaps? I'm not sure.. Speed can be negative though. For example, a car goes up a hill, slows, stops, then begins going backwards (speed/velocity is negative)

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|||Speed is |velocity|. So the absolute value of velocity. Since the speed nor the velocity ever go negative, the answer is B, her average speed and her average velocity are the same.