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18-04-2017
Physics

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a person walks 4.0 kilometers north, then 4.0 kilometers west. His displacement is closest to

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18-04-2017

use the Pythagoras for the magnitude and the tan^-1 x = -1 for the angle

displacement = 4^2 + 4^2 = 32 = 4 sqrt(2) = 5.65 km

angle is 135 degrees.

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