yes
If the player fails to cross the ball where ever the marker is before he physically steps out of bounds then it is not a first down. Although I'm not certain, I think the ball has to cross the marker in bounds as well.
No, whether in Basketball or Football, a player may not step out of bounds and receive the ball. However, once another player touches the ball, other than the one currently holding the ball, that player may receive the ball.
Kick off out of bounds, 20 yard penalty, ball goes to the 40
If a receiver is knocked out of bounds by a defensive player and the official believes the receiver would have come down in bounds with both feet had he not been contacted by the defender, then it's ruled a completed pass. ---- This rule has been changed for the 2008 season. There is no longer a 'force out' rule in the NFL.
Yes. The technical way to score a touchdown is to have to ball "cross the plane" into the endzone without the player being down or out of bounds. With a catch, the player must establish himself as inbounds while maintaining possession. In the NFL, the player must do so with two feet inbounds. In NCAA Division I football, the player only needs to do so with one foot inbounds. With a run, the player must have not stepped out of bounds before the ball crosses the plane into he endzone.
In the NFL both feet MUST be in bounds. In high school one foot MUST be in bounds, and flag football I believe one, maybe two.
A fumble is down when the recovering player is down or when the ball goes out of bounds...so yes, if the ball is fumbled forward and recovered by the offense, or goes out of bounds, past the first down marker, it is a first down. The exception is on fourth down. In the NFL, only the player who fumbled the ball can advance it on fourth down.
No. Only the point of the ball has to cross into the endzone to be concidered a touchdown, assuming the player has possesion of the ball. If the player catches the ball in the end zone, then yes, he has to get both feet down for the score to count. It's no different from the requirement to get both feet down for a completion on any other part of the field. In college and Canadian football, however, a player is only required to have one foot down for completions and touchdowns.
NFL player Alan Ball played for Illinois.
NFL player Montee Ball played for Wisconsin.
NFL player Marcus Ball played for Memphis.
Answer Yes.