Q2. Motion of a bacterium - Consider a 2-µm long bacterium like E. coli pictured below, with a mass density of 1090 kg/m³, swimming through water at a speed of 10 um/s. Outer membrane Inner membrane Chromosome (DNA) Ribosome Flagella a) Calculate the drag coefficient, y. b) Calculate the minimal force that the bacterial motors must be able to generate in order to move. Motor

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Q2. Motion of a bacterium - Consider a 2-µm long bacterium like E. coli pictured
below, with a mass density of 1090 kg/m3, swimming through water at a speed of 10
um/s.
Outer membrane
-Inner membrane
Chromosome (DNA)
Ribosome
Flagella
Motor
a) Calculate the drag coefficient, y.
b) Calculate the minimal force that the bacterial motors must be able to generate in
order to move.
c) How long does it take for this cell to stop moving
working?
d) Consider another bacterium twice as large, and swimming at the same velocity.
Which bacterium will travel less distance once the driving force is removed?
its bacterial motors stop
Transcribed Image Text:Q2. Motion of a bacterium - Consider a 2-µm long bacterium like E. coli pictured below, with a mass density of 1090 kg/m3, swimming through water at a speed of 10 um/s. Outer membrane -Inner membrane Chromosome (DNA) Ribosome Flagella Motor a) Calculate the drag coefficient, y. b) Calculate the minimal force that the bacterial motors must be able to generate in order to move. c) How long does it take for this cell to stop moving working? d) Consider another bacterium twice as large, and swimming at the same velocity. Which bacterium will travel less distance once the driving force is removed? its bacterial motors stop
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