They dont, they actually kick 8 yards back
In the NFL, the ball is spotted when wherever the pass interference penalty occurred and is an automatic first down. In NCAA football, the ball is spotted wherever the penalty occurred up to 15 yards and is an automatic first down.
To loosen the football up because new footballs can be a little hard and to expand the sweet spot that the kicker will be kicking.
Where the offense left the line of scrimmage
In the NFL, the ball will be placed at the spot of the hold after a missed field goal. If the kick took place from inside the 20, the ball is moved out to the 20. In college football, the opposing team gets the ball from the original line of scrimmage.
If you are on defense, you want to make sure you kick under the ball to get it up high in the air over everyone's head to clear it out. But for distance, you want to go to the center of the ball. Pick a spot in your ball in the middle and practice kicking there. After a while you will know about the right spot. Make sure you bring your leg back really far when going to kick it.
I assume you mean "Where is the spot of the ball for a kick off at the start of the game or the start of the half, or after a touchdown, or successful field goal attempt?" Standard kick of is at your own 35 yard line. Penalty's from previous plays, or an off sides on the kick off, can be enforced on the kickoff, or re-kick, moving the spot of the ball.
at the spot of the kick the 20
A kick off in football, is when one team sets up the ball whole their kickek kicks it. The team that is kicking kicks it as far as possible without kicking it into the end zone. The opposing team runs the ball, after catching it, as far as possible before getting tackled, and then continues play from that spot with the first down.
If the ball accidentally hits the referee during a direct free kick, the referee will stop play and restart the game with a dropped ball at the spot where the referee was hit.
The position of the ball determines the spot.
A kick off in football, is when one team sets up the ball whole their kickek kicks it. The team that is kicking kicks it as far as possible without kicking it into the end zone. The opposing team runs the ball, after catching it, as far as possible before getting tackled, and then continues play from that spot with the first down.
Kick-off Direct free kick Indirect free kick Penalty kick Corner kick Goal kick Throw-in Drop ball