FACTOID # 13: New York has America's lowest percentage of residents who are veterans.
 
 Home   Encyclopedia   Statistics   States A-Z   Flags   Maps   FAQ   About 
   
 
WHAT'S NEW
RELATED ARTICLES
People who viewed "Springboard" also viewed:
 

SEARCH ALL

FACTS & STATISTICS    Advanced view

Search encyclopedia, statistics and forums:

 

 

(* = Graphable)

 

 


Encyclopedia > Springboard
Diving off a springboard
Diving off a springboard

A springboard or diving board is used for diving and is a board that is itself a spring, i.e. a linear flex-spring, of the cantilever type. Download high resolution version (400x708, 65 KB)Caption: 031205-N-2306S-003 Catania, Sicily (Dec. ... Download high resolution version (400x708, 65 KB)Caption: 031205-N-2306S-003 Catania, Sicily (Dec. ... This article refers to the sport of jumping into water, often acrobatically, from a distance. ... Springs A spring is a flexible elastic object used to store mechanical energy. ... The cantilevered beam (green) hangs out into open space from its supporting structure (blue). ...


Springboards are commonly fixed by a hinge at one end (so they can be flipped up when not in use), and the other end usually hangs over a swimming pool, with a point midway between the hinge and the end resting on an adjustable fulcrum. A hinge is a mechanical device that connects two solid objects, allowing rotation between them. ... 50 meter indoor swimming pool For the 2003 film, see Swimming Pool. ... Fulcrum is the NATO reporting name of the MiG-29, a Soviet fighter aircraft. ...

Contents


Springboard materials

Springboards, (such as the commonly manufactured product made by Duraflex) are usually made out of aluminum. They are usually painted blue, and there is usually a textured grippy material (like crushed glass or sand) mixed with the paint to provide grip to persons not wearing shoes. Aluminum is a soft and lightweight metal with a dull silvery appearance, due to a thin layer of oxidation that forms quickly when it is exposed to air. ...


Adjustment of the spring constant

The spring constant of a springboard is usually adjusted by way of a fulcrum that is located approximately mid way along the springboard. Springboards are usually operated in a linear regime where they approximately obey Hooke's law. When loaded with a bather, the combination of the bather's approximately constant mass, and the constant stiffness of the spring(board) result in a resonant frequency that is adjustable by way of the spring constant (set by the fulcrum position). Since the resulting system is in an approximately linear regime, it may be modeled fairly accurately by a second order differential equation. Typically the resonant frequency can be adjusted over a range of a 2:1 or 3:1 ratio. In physics, Hookes law of elasticity is an approximation which states that if a spring is elongated by some distance, x, the restoring force exherted by the spring, F, is proportional to x by a constant factor, k. ... Mass is a property of physical objects that, roughly speaking, measures the amount of matter they contain. ... Stiffness is the resistance of an elastic body to deflection by an applied force. ... This article is about resonance in physics. ... In mathematics, a differential equation is an equation in which the derivatives of a function appear as variables. ... In algebra, a ratio is the relationship between two quantities. ...


Counter-intuitive user-interface

The fulcrum usually travels over a range of approximately 0.75 metre (30 inches), and is sets by way of a knob that is approximately 0.35 m (14 inches) in diameter. To stiffen the spring (as if tightening it), the knob is usually turned counter clockwise. This is counter intuitive, since usually things are tightened by turning clockwise. Additionally, if standing on the springboard, it is difficult to push the wheel with the foot, because the top of it needs to turn the other way from the way it moves. This is because the gearlike mechanism (usually a "soft gear" made of rubber) is on the board and not the base, so the wheel pivots against the board when rotated. Thus users often need to bend down and set the wheel, or come down from the board to set the wheel. Thus it would be much better if the gearing was on the base so that the wheel could be pushed with the foot, but tradition (consistency from board to board) dictactes maintaining a "backwards" convention. The metre (Commonwealth English) or meter (American English) (symbol: m) is the SI base unit of length. ... Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ... For the geometric term, see diameter. ... Spur gears found on a piece of farm equipment. ... Rubber is an elastic hydrocarbon polymer which occurs as a milky emulsion (known as latex) in the sap of a number of plants but can also be produced synthetically. ...

  • Note - Standing behind or in front of the knob, rather than directly above it, will give you better leverage to move the fulcrum. This is accomplished by holding on to the hand rails and leaning the body a few degrees, then placing your foot as low as possible on the knob. In this way, it is possible to move even the most difficult fulcrum.

The principle of the lever tells us that the above is in static equilibrium, with all forces balancing, if F1D1 = F2D2. ...

Heights of springboards

Springboards are usually located either 1.0 metre or 3.0 metres above the water surface. It is very seldom that one is mounted at a height other than these two standard heights. In olympic competition, only the springboards of height 3.0 metres are used.


Historical heights of springboards

Some years ago, springboards, usually made of wood, were located at heights of either 10 feet (approximately 3m), or 20 feet (approx. 6m), above the water.


  Results from FactBites:
 
Springboard 2000 (752 words)
Springboard 2000, an initiative launched by the National Women's Business Council, is designed to promote investment in women-led businesses across the country.
Hanson said presenting her business plan before investors at Springboard is similar to receiving a reference.
Although a single event like Springboard 2000 may not be able to change such perceptions, it may help women overcome their greatest disadvantage in the equity marketplace: poor networking skills.
Springboard - Wikipedia, the free encyclopedia (584 words)
A springboard or diving board is used for diving and is a board that is itself a spring, i.e.
Most springboards are painted, usually blue, and texture is often added to the surface by mixing crushed glass or sand with the paint to provide additional grip.
When loaded with a bather, the combination of the bather's approximately constant mass, and the constant stiffness of the spring(board) result in a resonant frequency that is adjustable by way of the spring constant (set by the fulcrum position).
  More results at FactBites »

 
 

COMMENTARY     


Share your thoughts, questions and commentary here
Your name
Your comments

Want to know more?
Search encyclopedia, statistics and forums:

 


Press Releases |  Feeds | Contact
The Wikipedia article included on this page is licensed under the GFDL.
Images may be subject to relevant owners' copyright.
All other elements are (c) copyright NationMaster.com 2003-5. All Rights Reserved.
Usage implies agreement with terms, 1022, m