13. For the vectors ... and .... shown in Fig.
1, (I) use a scale drawing to find the
magnitude and direction of (a) the
vector sum ... +.... and (b) the vector
difference ... -..... Use your
answers to find the magnitude and direction
of (c) -... -.... and (d) .... - ....
(II) Find the x and y components of each
vector and calculate (a) the magnitude and
direction of 2... - 3.... +....., ... +.... + ... +.....,
and -2... - 5.... + 4.....;
(b) find a unit vector in the direction of ... +
...., .... - ..., and ... +.... + ... +......
Fig.