"Using a hexagonal or dimpled pattern instead could significantly increase the consistency of its flight.
Like other Dacia models, it’s designed to be affordable – although…, (Pocket-lint) – The baby of the Lexus SUV range, the UX – which we first reviewed at release in the middle of 2019 – now…, Vivo will introduce its new custom user interface (UI), the Origin OS during the 2020 Vivo developer conference on November 19. We asked him to examine the physics of the float serve: What makes a serve float and how a server can maximize float. As a former volleyball player who used this to great effect, I enjoyed this article and would definitely fall on the side of not changing the ball to eliminate the 'floater'. There is not a lot of relative findings for my topic when researching. It was almost as if the ball was rotating about an off-centre axis. Numbers like those are hard for me to feel intuitively so for practical purposes I will instead refer to the ball speeds they represent, which gives us a range between 10 meters per second and 25 m/s, respectively. They used a robotic device to "serve" the balls to ensure consistency, then measured the drag coefficients for each ball. This state is called “turbulent flow.” (see figure 2). b. The Float Serve I am a volleyball player and also currently taking Physics in my last year of high school. The drag coefficient describes how much the flowing air "sticks" to the ball's surface. The serve involves hitting the volleyball in such a way to minimize the rotation of the ball, causing unpredictability in the ball’s movement and is akin to baseball's knuckleball. In this latest study, each ball was tested 30 times, for a total of 240 tests. During higher speed turbulent flow a volleyball will experience both drag and perpendicular lift which increases as the square of the velocity. But by paying attention to the physics of sports like volleyball, those concepts become easier to grasp.
The Reynold’s number is a ratio of inertial forces to viscous forces, and specifically for a volleyball in motion in the air, is found by the product of mass density of air, diameter of the ball, and the ball’s velocity, all divided by the viscosity of the air. The slower the ball is moving in the air, the higher the drag coefficient and thus drag will be.
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