1170N i=-mB=-351N.m 351N.m72=-702N·m mp=468N 13=mD=468N.mT1 = −mB = −351 N  m T2 = −702 N  m T3 = mD = 468 N  m m m m m A B C D =  = =  =  1170 351 468 N m N m N m