The momentum of a first clump of clay of mass 1kg is measured to be p1 = -2i + 3j (kgm/s); the second clump has mass 2 kg and has a momentum of p2 = 8i -3j(kgm/s). They collide and stick together. What is the total momentum of the system at all times? What is the final velocity of the combined clumps? What is the motion of this final clump in 1 sec?