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A 'doosra' is a delivery that an off-spinner bowls with an off spin action that spins from right to left. (This is different to a normal off spin delivery that spins left to right.) A 'googly' is a delivery that a leg spinner bowls with a leg spin action that spins from left to right. A 'googly' is also referred to as a 'wrong'un'. (This is different to a ...


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It is a matter of control over the stone's path. A rotating stone creates small scratches in the ice with its leading edge, which cause the trailing edge to change direction as it crosses them. This gives the curved path. Explained in this PhysOrg article, which also contains links to other explanations. Curlers master the skill of judging the rotation ...


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In summary, we have this picture. This picture shows the ball kicked from the right because the wind is heading towards the left. (Let's ignore for now the possibility of strong tailwinds.) Because the ball is rotating backward from the top, this ball has negative topspin - also defined as backspin. As for the wind lines...the closer the wind lines are, the ...


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First, in hockey the blade is curved. This will lead to the puck spinning clock wise or counter clock wise depending on if the player is right or left handed, and if the shot was taken with the front or back of the stick. Here is a link about the spin and sticks There are often times where the puck will have top spin or back spin. These are not always ...


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Surprised there wasn't more attention in the post edmastermind29 gave when they discuss buying a bowling ball. There is a huge difference in bowling ball types. If you pick up a ball that the lanes provide for you to use at the bowling alley... they are (covered with) plastic. Those balls are not designed to hook much, and without extreme techniques, you ...


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I believe it would NOT be a let. That is, it would be a legal service and the server would earn the point (assuming the receiver did not return it). I'm referencing the rules at PongWorld.com. In the description of the service (rule 2.06) the rules state (emphasis mine): 2.06.03 As the ball is falling the server shall strike it so that it touches first ...


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There is no way to hit a "knuckle ball" type shot in tennis - on purpose, at least. I've seen it happen very rarely after someone hits the ball with their frame or some part of their racquet other than the strings but I've never known or heard of anyone hit that kind of shot off their strings. The very nature of putting the strings against the ball is going ...


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More likely what happened is that the shot had little to no spin on it at all. This is difficult to perfect and hit on target, and the flight mechanics are virtually identical to a knuckleball in baseball. It probably did not actually change spin, but instead jumped about in a way that the kicker could not have even predicted.


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I understand your problem, that's common for all beginners. There are some training exercises for you: Firstly, FEEL THE BALL: Try to master all of these services: topspin, no spin, and backspin serve. By doing the serve yourself, you can feel the "gesture" of the serve; you can also feel the speed, the spin of this type of spin. Secondly, when you master ...


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The only way to master and play a sport to the best of your ability is PRACTICE, PRACTICE and more PRACTICE. 20 minutes of play time for 5 days a week is far too little to compete and give a fight against better players. You need to increase this practice time and make it more effective. Find a player who is of your competence level in the sport and ...


2

A toe strike will cause the face to open (face rotating clockwise) and the ball will spin counter-clockwise. This is called the "gear effect" and is named so because of how the face and the ball "mesh" together like gears. This is mostly noticeable with woods and drivers because their center of gravity is farther behind the face of the club, as compared ...


2

The actual technique for bowling with a hook is surprisingly simple when you learn about it. Many people when first trying to hook will do a lot of things to try to make their hand spin the ball. In fact, most of the work adding the proper spin (or rotation) to the ball is handled by gravity and a proper ball fit. Get a fingertip drilled ball that fits ...


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How you return a heavy topspin or backspin shot depends a lot on the placement of the shot. When you encounter a topspin shot, to counter with a topspin you are attempting to completely reverse the rotation of the ball, subsequently you would tend to have the face of the paddle slightly to moderately closed (forward) while swinging in an upward direction. ...


2

"Tossing the ball up" is also know as "flighting the ball" wherein the ball is bowled at more inclined trajectory. The reason spinners toss the ball up is to induce a false shot from the batsman to get him out. If the ball is bowled with a higher revolution count, then it dips & bounces much earlier than the batsman normally expects. Thus if the ...


2

Like @jamauss said, if you see the ball change direction after it bounces, that is a result of a slice shot, when a player follows through under the ball to create backspin, and occasionally (especially on drop shots - slices intended to land close to the net and stay close to the net after they bounce) a player will put side spin on the ball as well as ...


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This site has an excellent breakdown of everything you need to know about spin, including the various (27!) types of spin, the effects of the major types, how to read spin, how to handle it, and which types of spin are typically used for service or rallying. I'm not going to list all of that here, but the author stresses that the angle of your racket and ...


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What is a Slider? The slider or back spinner is the reverse of the top-spinner. Instead of bouncing and kicking as the top-spinner does, the back spinner delivery will skid onto the batsman. (Sources:1, 2) This article from cricket.com.au will help in understanding slider. Youtube What is off the seam bowling? Seam is the raised stitching around the ...


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Generally, many persons confused about Dosra and Carom ball ,both deliveries are deliver by the use of off-spine,and both of these deliveries looks like leg spin, turning from leg to offside. Usually a player can spot the carom ball very easily but picking doosra is hard, it requires a lot of experience/practice/effort and time . Carom ball: https://en....


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Nowadays we see wrist spinners bowling leg spin and googly and they are very successful. The googly isn't really a "nowadays" thing - it was first bowled in 1900 and has been part of just about every top-class wrist spinner's arsenal since then. But we do not see a finger spinner bowling off spin and doosra at the same time Yes, we do. To take a very ...


1

Get a basket of balls, go out to the court, and just practice them. Give the ball a high bounce. Set a specific target to hit, like try hitting the corner sides of the service lines.


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I have heard of a new device called playsight, but I've never seen it in action. http://www.playsight.com/whatisplaysight http://www.playsight.com They have it installed in some clubs. It does look pretty amazing.


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Check out the babolat play racket line which can measure levels of spin achieved with specific shots.


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Comparison to professional sport technology In professional sport technology, there are systems such as Hawk-Eye to approximate the flight path of the ball. According to Quora, it has "Six high performance cameras (up to 1000fps)". In golf, there are devices that track the features of the ball such as spin, angle and velocity. I don't know any low-budget ...


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Lifting with the fingers will do little to hook the ball, depending on the core and cover stock, some will be more aggressive than others. The best was is to add a little twist to the ball, Think of tossing a football spiral pass underhand.


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No, both of these players are finger spinners and both right handers (so can unambiguously be described as bowling offbreaks). They in fact have, in relative terms, similar actions. They are among the few 'traditional' off spinners left in the game at the International level, in that they both only bowl the regular offspinner and the arm ball, but no ...


1

If the face and path match up to the target at impact (zero path and zero face) and the ball is struck towards the toe of the club, the ball will start to the right (for right handed player) and curve back to the left. This is know as gear effect. Its more exaggerated in a driver due to the center of gravity of a driver being further back in the head than an ...


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The answer is: anti-clockwise (for a right-handed This is contrary to what seems (to me anyway) to be intuitively obvious. The mechanism at work is the same as two adjacent rotating gears - they rotate in opposite directions. Indeed, this phenomenon is known as the 'gear effect'. The club face rotates clockwise (opens) which imparts anti-clockwise spin to ...


1

Assuming you are talking about just serves. While facing a heavy top spin serve, I was never successful with upward swing, no matter how close the angle, while a forward swing closed angle blocking (let the ball stay more time on racket) shot worked. Heavy Bottom spin can be countered by a push stroke, where you again let the ball stay more time on racket to ...


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