Two objects of the same mass travel in opposite directions along a horizontal surface. Object X has a speed of 5m/s and object Y has a speed of 5m/s. After a period of time, object X collides with object Y. In scenario 1, the objects stick together after the collision. In scenario 2, the objects do not stick together after the collision. Consider scenario 1. Is the object X–object Y system open or closed? Predict whether both the momentum and the kinetic energy of the system will be the same or different after the collision.