You throw a bouncy rubber ball and a wet lump of clay, both of mass m, at a wall. both strike the wall at speed v, but while the ball bounces off with no loss of speed, the clay sticks. what is the change in momentum of the clay and ball, respectively, assuming that toward the wall is the positive direction? 0; mv mv; 0 0; −2mv −mv; −mv −mv; −2mv