Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 18.0 kg and an initial velocity of v0A = 8.15 m/s, due east. Object B, however, has a mass of mB = 28.0 kg and an initial velocity of v0B = 5.05 m/s, due north. Find the magnitude of the final velocity of the two-object system after the collision.