Block X of mass mo is at rest at the top of a ramp, and the block's center of mass is at a height H above the ground. Block X is then released from rest, and it slides down the ramp and collides with block Y of mass mo, which is initially at rest and has its center of mass at a
height h above the ground. At the moment before the collision, block X has a speed of vo. After the collision, block Y travels such that it
lands at point P.
Consider the block X-block Y system from the moment in time that block X is released from rest to the moment immediately after block X
collides with block Y. Which of the following claims best describes the system?
А
Because the total momentum of the system does not remain constant, the system is open.
B
Because the total kinetic energy of the system does not remain constant, the system is open.
с
Because the total momentum of the system remains constant, the system is closed.
D
Because the total kinetic energy of the system remains constant, the system is closed.