Oh, wait a minute, I see.
The club head traveling with uniform speed shall impart a force on the ball for a brief duration of time,
as given by the equation F t = m v In other words, the momentum of the club-head, imparts a force
on the ball for a very brief interval of time and this causes the ball to accelerate off the tee even though
the club-head is traveling with uniform speed.
Now that I think about it, the time is so brief, the amount of force...