In order for the ball to be out of play the whole of the ball has to cross the whole of the line therefore technically the lines are part of the field of play.
No, the ball must completely cross the line to be out of play.
play on the whole of the ball must cross the line
The lines are part of the soccer field when the ball is in play. We know that the Laws of the Game require that a ball cross wholly over the touch line to be in touch (out of play), or wholly over the goal line within the goal to be a goal (fouls or other infractions of the Laws of the Game aside).
A goal kick does not have to cross the halfway line. However, it must completely exit the Penalty Area while in the field of play in order for the ball to be back in play.
if the ball doesn't cross the line of scrimmage
The team that has the ball has to cross the touchdown plain (white line) and still have possession.
Your feet are not allowed to cross the line if you are making contact with the ball or involved in a play, but otherwise yes.
No, the ball does not have to cross the goal line in the FOP to score a touchdown. The GL extends outside of the pylons and in theory, go around the world. If the ball breaks the plane of the GL extended, it is necessary in the NFL to have any part of the ball carrier's body cross over the pylon or inside the pylon, even though the ball crosses outside of the pylon.
A goal is awarded when the ball exits the field across the goal line, between the goal posts, and under the cross bar when the ball is in play.
When the ball carrier is tackled and does not pass ball to teammate or the ball is out of bounds, the play is called a scrum, and the yard line where the last play was downed is called the line of scrimmage. -----In American football, draw a line from sideline to sideline where the ball is put into play on each down and that is the line of scrimmage.