SlideShare utilise les cookies pour améliorer les fonctionnalités et les performances, et également pour vous montrer des publicités pertinentes. Si vous continuez à naviguer sur ce site, vous acceptez l’utilisation de cookies. Consultez nos Conditions d’utilisation et notre Politique de confidentialité.
SlideShare utilise les cookies pour améliorer les fonctionnalités et les performances, et également pour vous montrer des publicités pertinentes. Si vous continuez à naviguer sur ce site, vous acceptez l’utilisation de cookies. Consultez notre Politique de confidentialité et nos Conditions d’utilisation pour en savoir plus.
History of Table TennisThe game of table tennis probably descended fromthe game of "Royal Tennis" (also known as RealTennis or Court Tennis), which was played in themedieval era. In the 1990’s, Englishman James Gibbis credited with bringing hollow celluloid balls back toEngland from the USA, although some other sourcesclaim they were plastic balls. Previously most ballswere solid rubber or cork, often covered in material.Some sources also credit Gibb with inventing thename "ping pong", which was supposed to havebeen derived from the sound of the ball bouncing offthe drum battledores (paddles), each of which had adifferent sound.
EquipmentsO Ball - 2.7 gram, 40 mm diameterO Table - c 2.74 m (9 ft.) long, 1.52 m (5 ft.) wide, and 76 cm (30 inch) high with a Masonite (a type of hardboard) or similarly manufactured timber, layered with a smooth, low-friction coating. The table surface is divided into two halves by a 15.25 cm (6 inch) high net.
EquipmentsO Racket - The average size of the blade is about 6.5 inches (16.5 cm) long and 6 inches (15 cm) wide wooden blade covered with rubber on one or two sides.O Net - usually made of a dark-colored mesh, which is clearly visible against a white or an orange ball.
O Starting a gameAccording to ITTF rule 2.13.1, the first service isdecided by lot normally a coin toss. It is also commonfor one player (or the umpire/scorer) to hide the ballin one or the other hand (usually hidden under thetable), allowing the other player to guess which handthe ball is in. The correct or incorrect guess gives the"winner" the option to choose to serve, receive, or tochoose which side of the table to use. (A common butnon-sanctioned method is for the players to play theball back and forth four times and then play out thepoint. This is commonly referred to as "play to serve"or "rally to serve".)
Service and returnO In game play, the player serving the ball commences a play. The server first stands with the ball held on the open palm of the hand not carrying the racket, called the freehand, and tosses the ball directly upward without spin, In casual games, many players do not toss the ball upward; however, this is technically illegal and can give the serving player an unfair advantage.O The ball must remain behind the end line and above the upper surface of the table, known as the playing surface, at all times during the service. The server cannot use his body or clothing to obstruct sight of the ball; the opponent and the umpire must have a clear view of the ball at all times. If the umpire is doubtful of the legality of a service they may first interrupt play and give a warning to the server.O If the service is "good", then the receiver must make a "good" return by hitting the ball back before it bounces a second time on receivers side of the table so that the ball passes the net and touches the opponents court, either directly or after touching the net assembly
First Problem:Find the distance of the table tennis ball if it was thrownat the speed of 2 meters per 0.5 seconds. d=?Speed= 2 meterstime= 0.5 secondsFormula: d = s x t d = (2 meters)(0.5sec.) d = 1 meter/second
Second Problem:O In a table tennis match, Marlo hit the ball with an average distance of 1.3 meters in 0.5 seconds. Find the speed.s=?d= 1.3 meterst= 0.5 secondsFormula: s = d/t s = 1.3 meters/0.5 seconds s = 2.4 meters/second
Third Problem:In a doubles match, Khryssle hit the ball with a distance of 0.75meters/sec in 3.0 seconds, while Yeuli hit the ball with 0.50meters/sec in 5 seconds. Find their velocity.Khryssle: Yeuli:v=? v=?d= 0.75 meters/sec d= 0.50 meters/sect= 3.0 seconds t= 5 secondsFormula: v = d/t v = d/tv = 0.75 meters/3.0 seconds v = 0.50meters/5secondsv = 0.25 meters/sec v = 0.1 meters/sec to the right to the left