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The bacterium Escherichia coli (or E. coli) is a single
Chapter 20, Problem 57GP(choose chapter or problem)
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, it swims along zigzag paths at a constant speed changing direction at varying time intervals. Figure P1.61 shows the positions of an E. coli as it moves from point A to point J. Each segment of the motion can be identified by two letters, such as segment BC. During which segments, if any, does the bacterium have the same a. Displacement? b. Speed? c. Velocity?
Questions & Answers
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, it swims along zigzag paths at a constant speed changing direction at varying time intervals. Figure P1.61 shows the positions of an E. coli as it moves from point A to point J. Each segment of the motion can be identified by two letters, such as segment BC. During which segments, if any, does the bacterium have the same a. Displacement? b. Speed? c. Velocity?
ANSWER:ANSWER: a) Same displacement The concept of displacement is, an object is displaced about how much amount and it must has a specific directions. This is the reason we call displacement as a vector quantity. As we know that distance is a scalar quantity, it can have any orientation. With this knowledge if we proceed, we can see from the above figure that AB, CD and IH have same magnitude. EF and FG have same magnitude. But the difference is, IH has a different orientation. EF and FG