Two identical carts are traveling in opposite directions. The carts carry a different load and travel at different speeds. The figure shows the two carts just before they undergo a perfectly inelastic collision. 20 cm/s 40 cm/s 8 kg 4 kg = DEN There students are discussing the situation: Anna: "These carts will both be at rest after the collision since the initial momentum of the system is zero, and the final momentum has to be zero also." Bernie: "If that were true it would mean that they would have zero kinetic energy after the collisions, and that would violate conservation of energy. Since the cart on the right has more kinetic energy than the other, the combined carts will be moving slowly to the left after the collision." Carlo: "I think that after the collision the two carts will be traveling to the left at 20 cm/s. That way conservation of momentum and conservation of energy are both satisfied." Which one of them do you agree, if any? Explain your reasoning.