> Now, admittedly, I didn't do well in physics, so someone has to explain to
> me how a serve that goes faster -- therefore hit harder -- is less "heavy"
> than a serve that is slower, which by implication is hit more softly.
> Perhaps I'm missing something.
A "heavy" serve is a serve with a lot of spin on it, particularly topspin.
It makes a big difference to the returner, because all things equal (i.e.,
speed), a heavy serve is "harder to handle", it seemingly explodes with
greater force into the racket.
That's why Sampras's 125 mph serve was so much harder to handle than most
other 125 mph serves. Most guys have to "flatten" the ball to get that much
speed, but Sampras reached that velocity with loads of spin.
Becker hit a very heavy serve as well.
I do not think the United States would come to an end if
we lost our power to declare an Act of Congress void. I do
think the Union would be imperiled if we could not make
that declaration as to the laws of the several States.
- Oliver Wendell Holmes, on the SCOTUS