What is the drag coefficient of a ball?
Drag across a golf ball can affect distance traveled when hitting a ball. An average golf ball will have a drag coefficient of, 0.24 < CD < 0.7, in a Reynolds number range of 30,000 < ReD < 108,000. This paper investigates the effect of dimple patterns on the boundary layer around a ball.
Why is there no H in wiffle ball?
Mullany’s grandfather decided to go with “whiff,” a slang term meaning to swing and miss. He came up with “whiffle” but then dropped the “H” when he applied for the trademark. “It also meant he needed one less letter for the sign on the building,” Mullany chuckles.
What are 5 rules of Wiffle Ball?
The Game
- Five innings equals a complete game.
- Ten-run “mercy rule” applies after three complete innings.
- Two outs allowed per inning for each team.
- Five balls equal a walk and two strikes count as an out.
- In extra innings, both teams will start the inning with the bases loaded.
How deep is a wiffle ball field?
Basic Dimensions: Bases: 45 feet Mound-Plate: 32 feet Infield Depth: 47.5 feet Left Field Line: 120 feet Center Field: 130 feet Right Field Line: 115 feet Left Field Wall: 5 Feet Left-Center Alley:…
What is a good drag coefficient?
Typical drag coefficients The average modern automobile achieves a drag coefficient of between 0.25 and 0.3. Sport utility vehicles (SUVs), with their typically boxy shapes, typically achieve a Cd=0.35–0.45. The drag coefficient of a vehicle is affected by the shape of body of the vehicle.
What does a drag coefficient of 1 mean?
The Reynolds number will be low for small objects, low velocities, and high viscosity fluids. A equal to 1 would be obtained in a case where all of the fluid approaching the object is brought to rest, building up stagnation pressure over the whole front surface.
Can you steal bases in wiffle ball?
Unlike baseball, there is no stealing bases, and movement between bases can only be done on a scoring shot. Hitting the ball into the single zone enables the player to advance one base, hitting into the double zone enables them to advance two bases, and a triple three bases.
Can you bunt in wiffle ball?
For a complete inning, both sides must bat. An out for the batter can be made in three ways: The batter can strike out only if he/she swings at a pitched ball and does not foul tip the t hird strike. Bunting is not allowed and the batter cannot obtain a base on balls.
Are you allowed to steal bases in wiffle ball?
Rules of Wiffle Ball Unlike baseball, there is no stealing bases, and movement between bases can only be done on a scoring shot. Hitting the ball into the single zone enables the player to advance one base, hitting into the double zone enables them to advance two bases, and a triple three bases.
How hard can you throw a Wiffle ball?
It seems impossible that a wiffleball could be thrown over 35mph. The top tier wiffleball players pitch at an average speed of around 70mph. With the mound a short 49 feet away from the strike zone, that pitch seems a little more like 100mph.
How far can you hit a wiffle ball?
If you hit it right, the ball can sail 150 feet – you can’t tell me that isn’t fun. As long as your pitcher can get the ball anywhere near the plate, you can put together some pretty impressive homers. And since balls don’t travel that far, you don’t have to chase all that much.
How is the drag coefficient of a shape calculated?
The drag coefficient Cd is equal to the drag D divided by the quantity: density r times reference area A times one half of the velocity V squared. This slide shows some typical values of the drag coefficient for a variety of shapes.
Is the drag coefficient independent of Mach number?
, the drag coefficient is independent of Mach number. Also, the variation with Reynolds number within a practical range of interest is usually small, while for cars at highway speed and aircraft at cruising speed, the incoming flow direction is also more-or-less the same. Therefore, the drag coefficient can often be treated as a constant.
How is the drag coefficient related to Reynolds number re?
Larger velocities, larger objects, and lower viscosities contribute to larger Reynolds numbers. Drag coefficient Cd for a sphere as a function of Reynolds number Re, as obtained from laboratory experiments. The dark line is for a sphere with a smooth surface, while the lighter line is for the case of a rough surface.
What is the drag coefficient of a wedge shaped prism?
A flat plate has Cd = 1.28, a wedge shaped prism with the wedge facing downstream has Cd = 1.14, a sphere has a Cd that varies from.07 to.5, a bullet Cd =.295, and a typical airfoil Cd =.045.