ByEq(7-12) Mx n,x x Fig 7-11 (9.6kg)×(104m)-(6.5kg)×(13.6m) 3.1kg =3.7m Cm M 0.9mBy Eq(7-12) Fig 7-11 m m My m y y cm 0.9 2 1 1 2 = − = m k g k g m k g m m Mx m x x cm 3.7 3.1 (9.6 ) (10.4 ) (6.5 ) (13.6 ) 2 1 1 2 =  −  = − = → 0 v 0 • Cm • • m1 m2