![]() ![]() ![]() However, with a little experience, people realize the fulcrum moves in the direction the bottom of the foot faces when placed on the foot wheel. ![]() Some may find this counter intuitive, since usually things are tightened by turning clockwise. To stiffen the spring (as if tightening it), the foot wheel is usually turned counter clockwise. The fulcrum on competitive diving boards travels over a range of 0.61 metres (24 inches), and is set by way of a foot wheel that is approximately 0.35 m (14 in) in diameter. Typically the resonance frequency can be adjusted over a range of a 2:1 or 3:1 ratio. Since the resulting system is in an approximately linear regime, it may be modeled fairly accurately by a second order differential equation. When loaded with a diver, the combination of the diver's approximately constant mass, and the constant stiffness of the spring(board) result in a resonance frequency that is adjustable by way of the spring constant (set by the fulcrum position). Springboards are usually operated in a linear regime where they approximately obey Hooke's law. The spring constant of a springboard is usually adjusted by way of a fulcrum that is located approximately mid way along the springboard. Adjusting fulcrum with foot prior to a dive ![]()
0 Comments
Leave a Reply. |