In football, a first down is attained when an offensive team makes its first 10 yard goal. The offensive team has four tries to move the football 10 yards each try. Every time 10 yards is reached, it is a first down.
360 inches are required for a first down
If you are talking about the line ofscrimmage or the First down line it is animated.
In college and the NFL, yes. In high school it is not an automatic first down, but in most circumstances the 15-yard penalty will result in a first down anyway.
In pro football, defensive holding results in a five yard penalty and an automatic first down.
Yes, he also played the role as a football player in the movie "The Longest Yard".
from the 20 yard line to the back of the touch down
If, after gaining a first down, a player is tackled at the one yard line, then it would be 1st and 1. Some may consider this 1st and goal.
A loss of yardage in football is when someone on the team holds the football in his/her hand(s)/arm(s) and someone on the other team tackles the person with the football before the person with the football can advance across the line in which the play started. For example: the team with the football start on the fifty yard line and they need to advance the ball to the forty yard line for a first down. The football gets snapped to the quarterback. The quarterback has two options: run with the football or throw the football to someone on his/her team so the team can attempt to get the ball across the forty yard line. The quarterback notices that someone on the other team is running at him/her and runs backwards to the forty yard line. Before the quarterback has the chance to either run with the football or throw the football, the person tackles the quarterback at the forty yard line resulting in a ten yard loss.
36 inches in a yard, football or otherwise.