Abstract We study signatures of physical constraints on free rotations rigid bodies. show analytically that the or non-physical nature moments inertia a system can be detected by qualitative changes both in Montgomery phase and tennis racket effect.

A major element in expert sports performance, particularly racket-and-ball games, is excellent anticipatory skill. A prestudy combined the temporal and spatial occlusion paradigms to ascertain which key stimuli badminton players use for anticipating the direction of overhead shots. The main study then evaluated a program for training anticipatory skills; 200 video clips were employed to orient ...

The generative learning strategy assisted by flash animation had not been applied to overcome learners’ misconceptions. This research aims find out the effectiveness of remediate misconceptions toward Newton’s law about gravity and determine way decrease after intervention. quasi-experimental method with pretest-posttest control group design. was conducted at Public Senior High School 5 Yogyaka...

A new set of features is introduced for characterization of impulsive events in video clips from the audio signal. The discriminative power of these features to detect and isolate racket hits in tennis video clip is discussed.

The importance of the flat serve in tennis is well documented, with an abundance of research evaluating the service technique of adult male players. Comparatively, the female and junior serves have received far less attention. Therefore, the aims of this study were to quantify the flat serve kinematics in elite prepubescent, pubescent, and postpubescent female tennis players. Full body, racket,...

The simple task of bouncing a ball on a racket offers a model system for studying how human actors exploit the physics and information of the environment to control their behavior. Previous work shows that people take advantage of a passively stable solution for ball bouncing but can also use perceptual information to actively stabilize bouncing. In this article, we investigate (a) active and p...

Eighteen elite male tennis players were tested to determine their ability to identify string tension differences between rackets strung from 210 N (47 lb) to 285 N (64 lb). Each player impacted four tennis balls projected from a ball machine before changing rackets and repeating the test. Eleven participants (61%) could not correctly detect a 75 N (17 lb) difference between rackets. Only two pa...