4  Addition of Vectors
A vector AB
uuur
 simply means the displacement from a
point A to the point B Now consider a situation that a
girl moves from A to B and then from B to C
(Fig 10 7) The net displacement made by the girl from
point A to the point C, is given by the vector AC
uuur  and
expressed as
AC
uuur  = AB
BC
+
uuur
uuur
This is known as the triangle law of vector addition