COSMOS: Complete Online Solutions Manual Organization System 
                      
                     Chapter 16, Solution 1.  
                      
                      
                                                                              
                        
                        
                        
                        
                        
                        
                        
                        
                        
                        
                               ∑MN=°1.5m sin60 Š294.3N 0.75m cos60° 
                                           ()()()()
                                    AB
                                                                        2
                                                        =°30 kg 4 m/s      sin60    0.75 m  
                                                          ()()()
                                                                  ()
                                                    NB =144.96 N 
                                                   ∑FN=ŠF=30kg 4m/s2  
                                                      xB ()
                                                     F = 24.96 N  
                                                22
                       (a)             RN=+F=295.36N 
                                         AA
                                                                                                       or   RA = 295 N      85.2° ! 
                                                             Š1 294.3
                                                     α ==tan            85.2° 
                                                                24.96
                                                                                                           and  B =145.0 N        ! 
                       (b)                                 F     24.96
                                                      µ == =0.08481 
                                                          NA     294.3
                                                                                                                  or   µ = 0.0848 ! 
                      
                     Vector Mechanics for Engineers: Statics and Dynamics, 8/e, Ferdinand P. Beer, E. Russell Johnston, Jr.,   
                     Elliot R. Eisenberg, William E. Clausen, David Mazurek, Phillip J. Cornwell 
                      © 2007 The McGraw-Hill Companies.