Physics :adaobi walked 2km due west and then 2km due south. Calculate the displacement of the girl.

Answer 1

on an x y coordinate system
x = -2
y = -2

the magnitude is sqrt (4+4) = 2 sqrt(2)
the direction is 45 degrees below -x axis
= 180 + 45
= 225 degrees counterclockwise from +x axis