Weirdly, a curling stone on ice does exactly the opposite: if it rotates to the right, it curls right, and vice versa. But why? He proposed that, like the beer bottle, the curling stone tips forward slightly as it slides; the added pressure warms the ice, creating a thin film of water that acts as a lubricant, which reduces the friction in the front and, by comparison, increases it in the back.
This became known as the thin-liquid-film model, and it reigned for a few years, largely for want of challengers. Even stranger, the curl stays pretty much the same whether the stone rotates twice or twenty times. Not long before, in the journal Wear , they had proposed a model of their own , which became known as scratch-guiding theory.
Using images from an electron microscope, the researchers showed that, as a curling stone slides along, it leaves fine scratches on the ice in the direction of rotation. The scratches are laid down by the front edge of the running band, but when the back edge encounters them it has a tendency to follow them, causing the stone to curl in the direction of rotation. In one setup, they created a lane in which the ice was scratched in one direction and then, farther on, in the other direction.
Then they slid a stone down the lane and watched as it curled, first one way and then the other. He feels further vindicated by a controversy that broke out a couple of years ago: curlers were using new brooms that scratched the ice rather than merely warming it, enabling them to control the curl like never before.
Coverage by New Yorker writers of the Winter Olympics. Recently, Shegelski teamed up with Edward Lozowski, a physicist and atmospheric scientist at the University of Alberta, to reconsider the curling conundrum. Some years earlier, Lozowski had published papers on the science of bobsledding and speed skating. Together, the two men developed an improved explanation, which they unveiled in the latest issue of Cold Regions Science and Technology.
They call it the pivot-slide model. Lozowski, whom I spoke to over Skype, explained it to me by holding up a hair comb and running his finger slowly across the teeth. The same force will cause a circular saw, when it binds, to jump up and try to pivot around the obstacle. They emphasized that there is still a lot of research to be done—making models of the curling ice, quantifying the number of pebbles per unit area.
By Christopher Heaney. Still, many people look at it as a winter lawn game and not a sport. What do you think? People like to point and laugh at curling, but if they ever stepped onto the ice, they would know it is as difficult as any sport at the Olympics.
It's one thing to just hurl a stone down the ice, but it takes precision to place a stone in one spot in the middle of the ice. Then, there are the angles you have to play, avoiding guards and bouncing stones off one another to set-up the perfect guard. And if you think sweeping is as easy as it is at home, you're in for a painful surprise. Curling takes strength and precision to be successful.
It is a legitimate sport. If curling is a sport, so is sweeping my kitchen floor. We're talking about glorified shuffleboard on ice. Curling should have never been included at the Winter Olympics. It doesn't take much skill to throw a stone and have it bounce around to score. This is a game that belongs on unused hockey rinks, not on the Olympic stage. Curling isn't a sport. Sweeping ice is not a sport.
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