two carts are sitting on air track (frictionless surface). assume cart a has mass of 0.50 kg, cart b has mass of 1.0 kg. you give cart a an initial speed of 5.0 m/s toward b which was originally at rest. the two carts stick together and move together. right after collision, the air is turned off so the two carts slide to a stop due to kinetic friction. assume the coefficient of kinetic friction is 0.20. how far did the two carts slide on the track after collision before coming to a stop?