E) 0/2 estion 4 A bacterium observed through a microscope starts at r,-2.2i + 3.

Question

E) 0/2 estion 4 A bacterium observed through a microscope starts at r,-2.2i + 3.7j-1.2 k m After 6.2 s it's located at T2 = 4.6i + 1.0 k m Eind the averaze velocity in unit vectors (write that in your logbook) and hence calculate the average speed to 2 decimal bacesmude We can only do this by assuming that the bacterium travels in a straight line, because only in this special case is average speed equal to of average velocity. The units of the average speed are Find the average velocity in unit vectors (writ (you'll have to type this as um/s). Fe F6 ESC 8 7 8 5 6 3

Explanation / Answer

Average velocity = displacement/time

= [r2-r1]/t

= [2.4i -3.7j +3.1k]/6.2

= 0.387i - 0.597j + 0.5k um/s answer

speed = sqrt(0.387^2+0.597^2+0.5^2)

= 0.87 um/s answer

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