I know that one side of the ball needs to be shiny and the other rough.
2007-02-25 18:55:17 · 8 answers · asked by Anonymous in Sports ➔ Cricket
Wind or a breeze will no way help to swing a cricket bat as you will see from the write-up of swing bowling given below:
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 four factors:
The raised seam of the cricket ball.
Asymmetry in the ball caused by uneven wear of its surface.
The speed of the delivery
Their action
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.
At speeds around 80 mph (around 130 km/h), the airflow around the ball is in transition between smooth, or laminar flow, and turbulent flow. At speeds of 90 mph (around 145 km/h) and above, all the flow is turbulent. A medium-pace bowler, working at 75 to 80 mph (around 120 to 130 km/h), takes advantage of this. In this critical region, the raised seam and other minor imperfections in the ball's surface can induce turbulence while air flowing over other parts of the ball remains laminar. Turbulent air separates from the surface of the ball later than laminar flow air, so that the separation point moves to the back of the ball on the turbulent side. On the laminar flow side it remains towards the front. The result is a net force in the direction of the turbulent side.
Thus by keeping the seam and roughness to one side, the bowler induces the ball to swing in that direction. Skilled bowlers can even make a ball swing one way, and then 'break' the other way upon bouncing, with an off cutter or leg cutter hand action.
The 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 deviation of a swinging cricket ball is parallel to the axis of its rotation.
2007-02-25 22:47:22 · answer #1 · answered by vakayil k 7 · 0⤊ 0⤋
They are some of the ways to make the ball swing, but keeping one side shiny means that the ball will swing due to the roughness on the other side. The roughness creates turbulence as it travels through the air, thus causing the ball to swing
2007-02-25 19:08:27 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Definitely not.But it helps U swing d ball more.U just need 2 use d ball well 4 gud swing.D SHIM position sud b well 2 get gud swing.I think pace is not needed 4 swing coz IRFAN PATHAN & CHAMINDA VAAS sawing d ball more now a days dan any others.Just d speed sud b less dan 130 or so 2 get d most swing possible.
2007-02-25 19:33:22 · answer #3 · answered by ralphigo 1 · 0⤊ 0⤋
definetly, NO. Because, breeze is present only in a slight movement. It needs force exerted to swing the ball.
2007-02-25 19:06:34 · answer #4 · answered by louise marie constancia a 1 · 0⤊ 0⤋
No, we do not need wind or a breeze to swing a ball. the ball swings due to BERNOULLIS PRINCIPLE.
2007-02-26 01:35:31 · answer #5 · answered by Honey 2 · 0⤊ 0⤋
If there was a wind a ball on middle stump could be a wide.
2007-02-25 20:23:24 · answer #6 · answered by Wax Phantom 3 · 0⤊ 0⤋
No. The ball does need to have one side shiney and one side rough. It helps if conditions are overcast or humid.
2007-02-25 21:59:55 · answer #7 · answered by Graeme 1 · 0⤊ 0⤋
no
2007-02-26 17:16:04 · answer #8 · answered by john 7 · 0⤊ 0⤋