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Swing bowling is generally classed as a subtype of fast bowling.
The essence of swing bowling is to get the cricket ball to deviate sideways as it moves through the air towards the batsman. In order to do this, the bowler makes use of two factors:
The asymmetry of the ball is encouraged by the constant polishing of one side of the ball by members of the fielding team, while allowing the opposite side to deteriorate through wear and tear. Over time, this produces a marked difference in the aerodynamic properties of the two sides.
As a fast ball is bowled with the seam held vertically and rotation about a horizontal axis, there are two possible factors that can cause the ball to move through the air:
In combination, these two effects can produce considerable sideways movement of the ball through the air, known as swing.
Note that swing of a cricket ball is not caused by the Magnus effect, which gives rise to a force perpendicular to the axis of rotation (in this case up or down). The swing of a cricket ball is parallel to the axis of its rotation.
Typically, a swing bowler aligns the seam and the sides of the ball to reinforce the swing effect. This can be done in two ways:
The curvature of swing deliveries can make them difficult for a batsman to hit with his bat. Typically, bowlers more commonly bowl outswingers, as they tend to move away from the batsman, meaning he has to "chase" the ball in order to hit it. Hitting away from the batsman's body is dangerous, as it leaves a gap between the bat and body through which the ball may travel to hit the wicketThis article is about the cricket term. For the Ewok, see Wicket W. In the sport of cricket the word wicket has several distinct meanings: Meanings of wicket Set of stumps wicket consists of three stumps, upright wooden poles that are hammered into the gr. Also, if the batsman misjudges the amount of swing, he can hit the ball with an edge of the bat. An inside edge can ricochet on to the wicket, resulting in him being out bowled, while an outside edge can fly to the wicket-keeperCricket spin bowler The wicket-keeper in cricket is the fielding player who stands behind the batsman on strike at the wicket. The role of the wicket-keeper is governed by Law 40 of the Laws of cricket. His major function is to stop balls that pass the ba or slipsIn the sport of cricket, slip is a fielding position on the off side of the wicket-keeper, usually placed in that position in anticipation of a "snick", or edge, from the batsman which is too far from the wicket-keeper for him to catch comfortably. Many t fielders for a catch.
An inswinger presents relatively fewer dangers to the batsman, but can result in bowled or leg before wicketIn the sport of cricket, leg before wicket (lbw is one of the ways in which a batsman can get be dismissed. An umpire will rule a batsman out lbw under a complex series of circumstances that primarily include the ball hitting the batsman's body when it wo dismissals if the batsman misjudges the swing on the ball.
An inswinger combined with a yorkerIn cricket, a yorker is a delivery where the cricket ball bounces on the cricket pitch on or near the batsman's popping crease. Since a batsman in a normal stance has his feet on the popping crease, this means the ball is bouncing very near his feet, whic can be especially difficult for the batsman to defend against, especially if used as a surprise delivery after a sequence of outswingers.
It is a common belief that balls swing more in humid weather conditions, although no objective research exists to bear this out.