A body S1 of mass m, which moves at a speed of meter υ on a horizontal floor, collides centrally and plastically with a stationary body S2 twice its mass. If K1 is the kinetic energy of the body S1 before impact the kinetic energy of the agglomerate resulting from the impact is: α.K = K_ {1} / 3 β.K = K_ {1} / 9 c. K = 3K Choose the correct answer and justify your choice.