In a room, a ball is placed on a table. Quillon is standing on one side of the table, and Yara is standing on the opposite side. There is also a taller stool between them, obstructing their direct line of sight to each other. If Quillon rolls the ball across the table towards Yara, what will happen to the ball, and when will Yara first see the ball? Provide a brief response.
When Quillon rolls the ball across the table, the ball will move towards Yara, maintaining its motion due to inertia. It will eventually stop if friction and air resistance act upon it before it reaches the table's edge. Assuming the rolling ball has enough velocity to reach the edge of the table and the table has no barriers, the ball will fall to the ground due to gravity once it reaches the edge. Yara will first see the ball when it appears on her side of the stool, either while it's still on the table or at the moment it falls off the table, depending on the stool's dimensions and Yara's height relative to the table. If Yara is taller than the stool or if the stool does not completely block her view of the table's surface, she might see the ball rolling towards her before it falls. If the stool completely blocks her view, she will only see the ball after it has left the table.