Figure 4 - uploaded by Peter Mačura
Content may be subject to copyright.
Basketball hoop-inner diameter (0.45 m), hoop piping diameter (0.02 m) and distance (0.15 m) from the board (Official basketball rules, 2012) 2 .
Source publication
Preface
The ball trajectory is determined by the shooter's shooting motion at a particular time and place and his/her aim is to score a basket. As a result of this endeavor, the ball is shot at the basket.
The direction and initial speed of the shot determine whether the ball flies into the hoop or not.
The location and position of the point of r...
Contexts in source publication
Context 1
... hoop piping with a diameter of 1.6 to 2.0 cm has a circular shape. The bas- ketball rules require the hoop to be made of solid steel with an internal diameter of 0.450 to 0.459 m ( Figure 4) and painted orange. ...
Context 2
... Orthogonal point of release on the floor relative to the front surface of the board (Figures 32 and 33) is termed as angle relative to the board Height of the release point above the floor, and/or, location of the orthog- onal release point on the board plane Although no complete unity in the angular distribution of shooter positions on the field against the basketball board was reached (Figures 32 and 33), advice and experience focuses on the first area. The dependence of shooting success on the horizontal distance of the shooter from the hoop is affected by the shooter's position in the court in relation to the basketball board ( Figure 40). ...
Context 3
... determining the admissible margin of error in the horizontal direction of the flight path at the hoop, the respective angle will be measured on the horizon- tal plane of the court floor. When looking at the flight path from top (Figure 44), the maximum divergence from the hoop center is determined by the conditional angle β, (Hajossy -Mačura, 2011). ...
Context 4
... analyzing speed and throwing angle, it must be assumed that their mutual relation tolerates certain digressions (Figure 45). ...
Context 5
... a throw from a certain distance and release point height, the adequate ball ve- locity is limited by the acceptable margin of throwing angle and vice versa. In other words, for every throwing angle there is a set of throwing velocities result- ing in the ball falling into the hoop (Figure 46), and conversely, for every throw- ing velocity, there is a set of throwing angles resulting in the ball falling into the hoop (Figure 47). If the shooter throws the ball at the given throwing velocity from the given dis- tance and release point height but with an excessively large throwing angle, the ball trajectory is too arched and the ball hits the front section of the hoop or falls down in front of the hoop (θ 0 +Δθ + ) (Figure 48). ...
Context 6
... a throw from a certain distance and release point height, the adequate ball ve- locity is limited by the acceptable margin of throwing angle and vice versa. In other words, for every throwing angle there is a set of throwing velocities result- ing in the ball falling into the hoop (Figure 46), and conversely, for every throw- ing velocity, there is a set of throwing angles resulting in the ball falling into the hoop (Figure 47). If the shooter throws the ball at the given throwing velocity from the given dis- tance and release point height but with an excessively large throwing angle, the ball trajectory is too arched and the ball hits the front section of the hoop or falls down in front of the hoop (θ 0 +Δθ + ) (Figure 48). ...
Context 7
... other words, for every throwing angle there is a set of throwing velocities result- ing in the ball falling into the hoop (Figure 46), and conversely, for every throw- ing velocity, there is a set of throwing angles resulting in the ball falling into the hoop (Figure 47). If the shooter throws the ball at the given throwing velocity from the given dis- tance and release point height but with an excessively large throwing angle, the ball trajectory is too arched and the ball hits the front section of the hoop or falls down in front of the hoop (θ 0 +Δθ + ) (Figure 48). Conversely, if the shooter throws the ball at the given throwing velocity from the given distance and re- lease point height but with an excessively small throwing angle (θ 0 -Δθ -), the ball trajectory is too flat and the ball hits the back section of the hoop or flies behind the hoop. ...
Context 8
... relation (7) for an optimum release angle opt 0 has a very simple geometrical interpretation, as illustrated in Figure 49. ...
Context 9
... determining where the ball bounces off the board, the following criteria are crucial in the moment of impact: Mačura (2007) attempted to identify the points of rebound in successful set shots at a transparent basketball board from various locations in the field (Figure 64) in an experiment with four basketball players (Table 21). ...
Context 10
... results in the available (and heterogeneous) studies dealing with the physi- cal factors of basketball shooting over the past 50 years suggest that shooting directly into the hoop (Figure 73: Physical factors in basketball shooting directly into the hoop) and bank shots (Figure 74: Physical factors in basketball shooting with the ball rebound from the board) have much in common, and yet they are diverse. ...
Similar publications
We present the first continuous in situ hydro-meteorology observations from the south of Sri Lanka from a set of instruments deployed firstly in December 2012. The simultaneously record wind and wave data in this region are sparse due to difficulties in deployment. Here the survey, deployment and measurements of wind and wave are described with the...
Citations
... The main finding of this study was that during CS the entry angle of the ball was higher than the rest of the shots in both basketball and WB. In a high-trajectory shot where the ball has a higher angle of entry, the ball is more likely to enter the rim (Mačura, 2013). Similarly, Rupčić et al. (2015) showed that during successful shots the entry angle of the ball is higher in basketball. ...
... During a shot, lowering the release height results in an altered release velocity (Hamilton & Reinschmidt, 1997;Schwark et al., 2004) and increased propulsive forces (Mačura, 2013). Thus it may be predicted that during a shot the release velocity of WB players is higher than basketball players. ...
Shot accuracy is very important for success in wheelchair basketball (WB) and basketball games. The kinematics of the ball affects the shot accuracy. The main purposes of this study are to compare the kinematics of the ball according to the outcomes of WB and basketball players' shots and compare the shooting accuracy of WB and basketball players. Male senior athletes (17 basketball, 6 WB) voluntarily participated in the research. Participants made static shots from 6 spots (n=1515) and the analyses were made. The shots were separated into 4 groups. The first group contained the "Clean Shot"s (CS) which the ball goes into the hoop with no or 1 hit to the rim. The second contained all the "Success" shots (S) but CS. The third contained "Missed" shots, the ball hit to the rim. Fourth contained the rest of the missed shots (Air Ball). Reliable and valid 94fifty Smart Sensor Basketball was used in this research. For both WB and basketball players, CS angles were significantly higher than other shots and no significant difference was found between S angles and unsuccessful shots. CS angles of WB players were significantly higher than basketball players. This research showed that the entry angle affects CS for both sports. It is thought that it may raise CS and shooting percentage if coaches train their players by taking entry angles into consideration. Another finding of this study was CS angles of WB players are higher than basketball players. The reason for this may be the more active, hence more improved, upper extremity motor skills of the WB players.
