The bacterium Escherichia coli (or E. coli) is a single-celled organism that liv

Question

The bacterium Escherichia coli (or E. coli) is a single-celled organism that lives in the gut of healthy humans and animals. When grown in a uniform medium rich in salts and amino acids, these bacteria swim along zig-zag paths at a constant speed of 18 microm/s . The figure shows the trajectory of an E. coli as it moves from point A to point E. Each segment of the motion can be identified by two letters, such as segment BC

A.) What is the the bacterium's average speed for the entire trip?

B.) What is the magnitude of the bacterium's average velocity for the entire trip?

Explanation / Answer

average speed= total distance /total time = length of all line segements added together /total time

average velocity = length of vector AE / total time

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