ROD CROSS HOME PAGE
Why won't this metal tube
"sing" when I hit it with a tennis ball? It does when I hit it with a
golf ball.
Listen to a bell
(recorded at the same volume and ball speed) hit with
(a) a golf ball or (b) a
tennis ball
The bell might sound tinny if you
use internal speakers. Try it anyway as a test of the bass response of your
internal speakers. The fundamental frequency is 975 Hz. Internal speakers will
not respond at all to the f < 200Hz racquet sounds included on the tennis
page.
Brief CV
Born 1943. Lived in Berry, NSW until age 14 then moved to Forbes. B.Sc.
Dip. Ed at Sydney University. PhD in plasma physics in 1968. From 1968 to 1996
I worked in the Plasma Physics Department at Sydney University, specialising in
Alfven wave studies in the TORTUS tokamak. I retired in 2003 as an Honorary
member of staff, to continue work on the physics of sport and forensic physics.
SPORTS
PHYSICS
Superball 1000
f/s (note spin reversal)
TENNIS STRINGS at
1000 frames/sec (using a 725 g boule incident at low speed)
MORE TENNIS
and FIVE WAYS TO WIN A POINT
PUBLICATIONS
(and TENNIS MAGAZINE
ARTICLES)