Page 42 - eEISBN FINALIZE
P. 42

2.7    ANALYSIS OF THE VECTOR DIRECTED ALONG THE LINE


               In a lot of cases in statics while dealing with the engineering problems, the direction of a force is
               specified by two points through which its line of action passes. Such a situation is shown in figure

               2.15, where the force F is directed along the cord AB. F can represent as a Cartesian vector by

               realizing that it has the same direction and sense as the position vector r directed from point A to
                                                                                 
               point B on the cord. This direction is specified by unit vector    = ⁄ . Hence,
                                                                                   
                                                             =     


                                                                 
                                                           =   ( ⁄ )
                                                                   







































                                                             33
   37   38   39   40   41   42   43   44   45   46   47