Peter the rock of the church i don't think so
NATS 101 Lecture 12 Vertical Stability. Tennis Basics Racket velocity before hit Ball speed approaching Ball speed leaving Forehand: Racket velocity before.
Kang- Tsung Chang , Shou-Hao Chiang, Mei-Ling Hsu Geomorphology 89 (2007) 335–347
Do You Live on a Lava Flow?
