Posted by Jenna on .
A dog searching for a bone walks 4.31 m south, then runs 8.93 m at an angle 22.0 north of east, and finally walks 10.0 m west. Find the magnitude of the dog's resultant displacement vector.

physics 
drwls,
Add the three vectors.
The +y (north) component of the sum is
X = 4.31 +8.93 sin 22
The +x (east) component of the sum is
Y = 8.93 cos 22  10.0
The magnitude of the displacement vector is sqrt(X^2 + Y^2)
The direction (counterclockwise from east) is arctan Y/X 
history 
drew,
Describe how the Cold War ideology that crystallized after WWII changed wartime alliances that had existed during the war?