Re: Why are some golf clubs curved?

Golf clubs have curved faces because the club face will compress upon impact
with the ball.  This compression will transfer energy from the golfer to the club to the ball.
If the club face started out flat and compressed-- it would be indented.  If it were indented then if
the golfer did not it the ball squared; the ball would fly off at some crazy angle.  

The indentation is more severe on "woods" because those longer clubs hit the ball harder (longer lever arm).

Sincerely,

Tom Cull "Sports Physicist and Rotten Golfer"