Page 35 - eEISBN FINALIZE
P. 35

Figure 2.20
               It can be seen from figure that

                                                        = +(300   ) cos   

                                                        = −(300   ) sin   


               Observing that AB = 10 m


                                                          8       8       4
                                                          =   =        =
                                                                 10       5


                                                          6       6       3
                                                           =   =       =
                                                                 10       5
               So

                                                                4
                                                    = +(300   )   = + 240   
                                                                5

                                                                3
                                                    = +(300   )   = − 180   
                                                                5

                                                  = +(240   )   − (180   )  
                                                   





               In order to determine the resultant of several coplanar forces, each force must be resolved into its
               x and y components. Then, the respective components are added using scalar algebra since they

               are collinear.




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