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Loop (cricket)
In cricket, the flight of the ball is its trajectory through the air between being released by the bowler and bouncing on the pitch. The flight of a delivery may be varied by changing the pace of the ball or through use of the Magnus force. Flight is a key weapon of spin bowlers. A common objective of spin bowling is to beat the batsman "in the flight". This implies that the bowler has deliberately varied the trajectory of the ball in order to deceive the batsman as to the exact location it will land. This may result in the batsman missing or mis-hitting the ball and thus being dismissed. If the bowler bowls the ball slightly slower or with topspin, then the ball will land further away from the batsman that he would otherwise anticipate, whereas if the bowler bowls the ball slightly quicker or with backspin, then the ball will land closer to the batsman. Applying a lateral Magnus force will make the ball move sideways in the air, this is known as drift. The term "flighted deliver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piyush Chawla 2 2019
Piyush is a given name. Notable people with the name include: *Piyush Chawla (born 1988), Indian cricketer *Piyush Goyal (born 1964), Indian politician * Piyush "Bobby" Jindal (born 1971), American politician *Piyush Jha Indian author, film director and screenwriter *Piyush Mishra Piyush Mishra (born as Priyakant Sharma; 13 January 1963) is an Indian actor, lyricist, playwright, musician and screenwriter. Mishra grew up in Gwalior, and graduated from National School of Drama, Delhi in 1986. Thereafter, he started his ca ... (born 1963), Indian film and theatre actor, music director, lyricist, singer, scriptwriter * Piyush Trivedi (born 1958), Indian academician and educationist {{given name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cricket
Cricket is a bat-and-ball game played between two teams of eleven players on a field at the centre of which is a pitch with a wicket at each end, each comprising two bails balanced on three stumps. The batting side scores runs by striking the ball bowled at one of the wickets with the bat and then running between the wickets, while the bowling and fielding side tries to prevent this (by preventing the ball from leaving the field, and getting the ball to either wicket) and dismiss each batter (so they are "out"). Means of dismissal include being bowled, when the ball hits the stumps and dislodges the bails, and by the fielding side either catching the ball after it is hit by the bat, but before it hits the ground, or hitting a wicket with the ball before a batter can cross the crease in front of the wicket. When ten batters have been dismissed, the innings ends and the teams swap roles. The game is adjudicated by two umpires, aided by a third umpire and match referee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnus Force
The Magnus effect is an observable phenomenon commonly associated with a spinning object moving through a fluid. The path of the spinning object is deflected in a manner not present when the object is not spinning. The deflection can be explained by the difference in pressure of the fluid on opposite sides of the spinning object. The Magnus effect is dependent on the speed of rotation. The most readily observable case of the Magnus effect is when a spinning sphere (or cylinder) curves away from the arc it would follow if it were not spinning. It is often used by association football and volleyball players, baseball pitchers, and cricket bowlers. Consequently, the phenomenon is important in the study of the physics of many ball sports. It is also an important factor in the study of the effects of spinning on guided missiles—and has some engineering uses, for instance in the design of rotor ships and Flettner aeroplanes. Topspin in ball games is defined as spin about a ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spin Bowler
Spin bowling is a bowling technique in cricket, in which the ball is delivered slowly but with the potential to deviate sharply after bouncing. The bowler is referred to as a spinner. Purpose The main aim of spin bowling is to bowl the cricket ball with rapid rotation so that when it bounces on the pitch it will deviate from its normal straight path, thus making it difficult for the batsman to hit the ball cleanly.Knight, pp.122–123. The speed the ball travels is not critical, and is significantly slower than that for fast bowling. A typical spin delivery has a speed in the range 70–90 km/h (45–55 mph). Techniques Spin bowling is divided into four different categories, depending on the particular physical technique used. There is virtually no overlap between the two basic biomechanical techniques of wrist spin and finger spin. Depending on technique, a spin bowler uses either predominant wrist or finger motion to impart spin to the ball around a horizont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Topspinner
A topspinner is a type of delivery bowled by a cricketer bowling either wrist spin or finger spin. In either case, the bowler imparts the ball with top spin by twisting it with his or her fingers prior to delivery. In both cases, the topspinner is the halfway house between the stock delivery and the ''wrong'un'' - in the wrist spinner's case his googly, and in the finger spinner's case his doosra. Mechanics A topspinner is released over the top of the fingers in such a way that it spins forward in the air towards the batsman in flight. The forward spinning motion impedes air travelling over the ball, but assists air travelling underneath. The difference in air pressure above and underneath the ball (described as the Magnus effect) acts as a downward force, meaning that the ball falls earlier and faster than normal. In cricketing terms, this means that the ball drops shorter, falls faster and bounces higher than might otherwise be anticipated by the batsman. These properties are s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Backspin
In racquet sports and golf, backspin or underspin refers to the reverse rotation of a ball, in relation to the ball's trajectory, that is imparted on the ball by a slice or chop shot. Backspin generates an upward force that lifts the ball (see Magnus effect). While a normal hit bounces well forward as well as up, backspin shots bounce higher and less forward. Backspin is the opposite of topspin. In racket sports, the higher bounce imparted by backspin may make a receiver who has prepared for a different shot miss or mis-hit the ball when swinging. A backspin shot is also useful for defensive shots because a backspin shot takes longer to travel to the opponent, giving the defender more time to get back into position. Also, because backspin shots tend to bounce less far forward once they reach the opposite court, they may be more difficult to attack. This is especially important in table tennis because one must wait for the ball to bounce before hitting it, whereas in tennis the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boundary (cricket)
In cricket, the boundary is the perimeter of a playing field. It is also the term given to a scoring shot where the ball is hit to, or beyond, that perimeter, which generally earns four or six runs for the batting team. Edge of the field The boundary is the edge of the playing field, or the physical object (often a rope) marking the edge of the field. In low-level matches, a series of plastic cones are sometimes used. Since the early 2000s, the boundaries at professional matches are often a series of padded cushions carrying sponsors' logos strung along a rope. If one of these is accidentally moved during play (such as by a fielder sliding into the rope in an attempt to stop the ball) the boundary is considered to remain at the point where that object first stood. The boundary is at least from the centre of the field in men's international cricket, and at least from the centre of the field in women's international cricket. When the cricket ball is inside the boundary, it is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bouncing Ball
The physics of a bouncing ball concerns the physical behaviour of bouncing balls, particularly its motion before, during, and after impact against the surface of another body. Several aspects of a bouncing ball's behaviour serve as an introduction to mechanics in high school or undergraduate level physics courses. However, the exact modelling of the behaviour is complex and of interest in sports engineering. The motion of a ball is generally described by projectile motion (which can be affected by gravity, drag, the Magnus effect, and buoyancy), while its impact is usually characterized through the coefficient of restitution (which can be affected by the nature of the ball, the nature of the impacting surface, the impact velocity, rotation, and local conditions such as temperature and pressure). To ensure fair play, many sports governing bodies set limits on the bounciness of their ball and forbid tampering with the ball's aerodynamic properties. The bounciness of balls has ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
