Force along the slope = mg sin ?
                                              Â
= 5000* 9.8* sin 12
                                              Â
= 10187.6 N
Frictional force = ? N = ? mg cos ? = 0.9 *5000*9.8*cos 12
                                                              Â
= 43136 N
Frictional force is never greater than action force
So, frictanal force = 10187.6 N