Exercise 2.  Locate   and   vectorially and use vectors to find    and    when:

2 (a).        and  .

Solution 2 (a).

See text and/or instructor's solution manual.

We are done.   

Aside.  We can let Mathematica double check our work.

This solution is complements of the authors.

(c) 2008 John H. Mathews, Russell W. Howell