line of scrimmage
There is a line 3 yards off the goal line in the middle of the field where it is placed. The ball is in the same spot every time. Like every play the ball is spotted by the ref's.
The ball is placed on the 2 yard line when kicking a PAT
its a tee
It floats.
on the fourth corner.
no, it will be called almost every time.
The ball is placed at the point of the fartherest advance of the ball when the ball was declared dead. As an exmple if a player touches his knee down the ball will be placed where the fartherest point of the ball was when the knee touched down. This may or may not be where his knee touched down. The ball will be placed perpendicular to the line of scrimmge with the fartherest point of the ball at the point where the player had the ball when it was declared dead.
There are lines placed to divide the foul territory and the fair territory. Any ball that lands on the foul territory will be called foul. When the ball enters the fair territory, ball is at play.
In football, the ball is placed on the field after a play where the players movement has stopped. Although, if the player steps out of bounds, the ball is placed towards the center of the field to the nearest hash mark. If not, the ball would be placed at the sidelines.
It is a fumble when the ball is bobbled and a touchback when it goes out of the endzone. It is placed on the twenty yard line.
In high school and college, the ball is placed at the 3-yard line for the try (i.e., the PAT or conversion). In the NFL, it is placed at the 2-yard line.
The ball is placed where the ball actually is (assuming the player still has "possession") when the player is down by contact or when the knee hits the ground.