Results 181 to 190 of about 262,492 (221)

Tennis Ball Aerodynamics and Dynamics

2004
The detailed aerodynamics and dynamics of a tennis ball have only recently been uncovered with the help of a series of experimental studies (Mehta and Pallis, 2001, Cislunar Aerospace, Inc., 1998). Intuitively, one would expect the (rough) fabric covering on the ball to have an effect on the aerodynamics, but the extent of the effect turned out to be ...
Rabindra D. Mehta, Jani Macari Pallis
openaire   +1 more source

Dynamic properties of tennis balls

Sports Engineering, 1999
Measurements are presented on the dynamic properties of several different tennis balls, during impacts on a force plate. The force on a tennis ball rises rapidly to about half its maximum value in the first 200 μs of the impact due to compression of the cloth cover and the rubber wall near the impact point. The wall then collapses inwards, resulting in
openaire   +1 more source

Factors in Tennis Ball Wear

2006
Recent research has shown wear to affect ball performance during play, but contributing factors to wear differences have not been well identified. A framework has been developed to aide a systematic investigation into these factors. Several of these features are investigated in this paper, including repeated impacts, racket impact conditions ...
Carolyn Steele, Roy Jones, Paul Leaney
openaire   +1 more source

Eye Injuries From Tennis Balls

JAMA: The Journal of the American Medical Association, 1976
To the Editor.— With the ever-increasing popularity of tennis and of eye injuries of the type described by Seelenfreund and Freilich (235:2723-2726,1976), I should like to share with the readers a seemingly obvious (but often forgotten) piece of advice given to me many years ago. When standing at the net waiting for your partner to serve, never, never
openaire   +1 more source

Tennis-Ball Holder

AJN, American Journal of Nursing, 1980
openaire   +1 more source

The many flavours of mechanochemistry and its plausible conceptual underpinnings

Nature Reviews Chemistry, 2021
Robert O'Neill, Roman Boulatov
exaly  

Ball milling-assisted preparation of N-doped biochar loaded with ferrous sulfide as persulfate activator for phenol degradation: Multiple active sites-triggered radical/non-radical mechanism

Applied Catalysis B: Environmental, 2022
Ying Zhang
exaly  

Tennis Ball

Psychological Perspectives, 1982
openaire   +1 more source

Iron Tennis-balls

Notes and Queries, 1870
openaire   +2 more sources

The large piezoelectricity and high power density of a 3D-printed multilayer copolymer in a rugby ball-structured mechanical energy harvester

Energy and Environmental Science, 2020
Xiaoting Yuan, Xiangyu Gao, Jikun Yang
exaly