In football, the clock is stopped when the player goes off bound or is tackled. In college football, when a team earns a first down, the clock is stopped.
No. That's only a college-football rule.
After first down, after incomplete pass, when player goes out of bounds a timeout
No. Not in the NFL, only in college football
In college football, if a ball carrier gains a first down without running out of bounds, then the clock will start immediately. Running plays are often executed when a particular team wants to run down the clock if they are ahead.
No, that rule has been in college football for a long time but has never been adopted by the NFL.
The first official source of college football news was the NCAA. The first college football game was between Princeton and Rutgers University in 1869.
Yes, long enough for the officials to reset the down-and-distance chain. Then the clock is started again (unless it was stopped for another reason, such as a player going out-of-bounds).
1869 was the first season. The first college football game was between Rutgers and Princeton at Princeton College. P.S.: Rutgers won.