A girl delivering newspapers travels 1 blocks west, 3 blocks north, then 4 blocks east. what is the magnitude of her resultant displacement? answer in units of blocks.

Well, determine the x and y components of the displacement.

Vx = (-1) + 4 = 3

Vy = 3 = 3

Then use a^2 + b^2 = c^2.

a^2 + b^2 = c^2

c = sqrt (a^2 + b^2)

c = sqrt ((3) ^2 + (3) ^2)

c = sqrt (9 + 9)

c = sqrt (18)

c = ~ 4.2 blocks Determine the angle using arctangent.

arctan (3/3) = Theta

Theta = 45 degrees north of east

(by 'Theta', I mean the angle you are wishing to find)

_Part 3_

Since distance is a scalar, simply add up all the distances.

1 + 3 + 4 = 8 blocks