So if his force is equal to his mass times acceleration, and his mass doesn't change and I'm guessing his acceleration after he breaks the line is the same as when he hit the line...the force would in face be equal? Sorry if I'm making myself look really stupid here lol.
1. A defensive lineman breaks through the line and flattens the quarterback. The magnitude of the force he imparts on the poor quarterback is (a) greater than (b) the same as (c) less than, the magnitude of the force the quarterback imparts on the defensive lineman.
2. Not sure of any
3. I...