Originally Posted by chico9166
Yes it can...but linear momentum (as you mentioned) is the movement of one's center of mass in a straight line AND can be expressed in any direction. Modern players use considerable linear momentum (in an open stance for instance) by loading against the ground and pushing up to augment the tremendous rotational cycle that creates racquet head speed.
At any rate, as I mentioned, linear momentum has little direct effect on racquet head speed, but it's contribution to angular speed can be significant..
Although I don't think I can agree that the center of mass is moving in a straight line, I think I like that last statement....especially as you say "can be significant".