M = Center of (the occupant's) mass above the floor plane.
R = Radius of the rocker arc.
When M is less than R, or your center of mass is lower than the center of the rocker arc, the chair will return to center when rocked forward or back. The center position is when M is directly below the center point of the rocker arc.
From a side view, M is normally located at a Human's belly button when he/she is in a sitting position. For women it may be slightly forward of the belly button. A value for M can be found by positioning the human above the floor in a comfortable at-rest sitting position. Measure from the belly button to the floor to find M.
R > M, and a good dimension for R is 39" or so. Increasing R reduces the period of a rocking cycle. Reducing R increases the period of a rocking cycle. By changing R slightly the rocking period can be "tuned" to match the breathing rate of the occupant. The simple act of breathing, then, will shift the occupant's mass, causing the chair to rock back with each inhale and forward on exhale.
Feet on the floor will impede rocking motion. Ideally the occupant's feet will cycle from touching at toes to touching down the heel as the chair rocks.
4D
max planck
something dealing with physics.....
Quantum physics is the first turning point in physics and the second revolution is due to relativity theory
Einstein's Relativity Theory is at odds with quantum physics because Einstein's theory works at a macroscopic level, while quantum physics works at an atomic level, and things at the atomic level work differently from the macroscopic level.
The GUT or TOE "Theory of Everything" is the unification of Relativistic and Quantum Physics, probably via String Theory.
Yes there are companies specialized in kids rocking chairs. One can get kids rocking chairs from companies such as 'Adirondack', 'The Rocking Chair Company' and 'Beck International'.
I have a moderate tendency to associate rocking chairs to old people, but I know that there are also a lot of young people that like rocking chairs as well. Old people do not necessarily use rocking chairs.
The companies that specialize in producing child's rocking chairs is Made In China and China Made. These two companies are the best at making rocking chairs.
form_title= Outdoor Rocking Chairs form_header= Relax outside in your rocking chair. What would you like the dimensions of your chair to be?*= _ [50] What is your budget for rocking chairs?*= _ [50] How many chairs do you need?*= {1, 2, 3, 4, 5, More than 5}
To purchase rocking chairs online, you can try the selections at the Pottery Barn website, Troutman, or eBay. If you need a rental option ColorTyme offers rocking chairs for weekly payments.
Indoor rocking chairs can be found at many stores including Wal-Mart, Overstock, Home Depot, Wayfair, Amazon, and Country Rockers. Cushions for indoor rocking chairs can be bought from The Rocking Chair Company.
Yes, Ethan Allen does sell rocking chairs. They sell different styles of rocking chairs. You can buy a used Ethan Allen rocking chair for around $125. Brand new they typically cost around $250.
Cracker Barrell offers numerous styles of rocking chairs for both children and adults. The ready to assemble chairs start at $100 as do the child rocking chairs.
You should visit your local furniture shop or IKEA. They tend to have lots of different types of rocking chairs. My grandfather got his from rocking-chair.ch, though. A website for rocking chairs and he has neven been upset with his purchase.
Purchasing wooden rocking chairs poses several pros and cons that should be considered in advance before making a final purchase decision. It is often a good idea to consider these pros and cons because it can help you determine if it worthwhile to purchase a wooden rocking chair for your home.To see what we mean, please consider these interesting pros and cons before purchasing a wooden rocking chair for your home.Pros:Wooden rocking chairs are durable.This is not surprising because most wooden rocking chairs are manufactured using high-quality cherry, oak and teak woods. These woods are typically used to make wooden rocking chairs because their density allows them to withstand years of use easily.Wooden rocking chairs are easy to paint or stain.Many people enjoy painting or staining wooden rocking chairs because it is easy to apply paint onto the surfaces of rocking chairs. This is understandable because most wooden rocking chairs feature wood grain patterns that accept paint or wood staining products well.Moreover, most wooden rocking chairs are very comfortable.Many people enjoy sitting on wooden rocking chairs while reading or watching TV. This seems to be true because most wooden rocking chairs feature seats that can support a person's body weight comfortably.Cons:Wooden rocking chairs can be heavy to move around.Some people do not enjoy having wooden rocking chairs in their homes because they have a hard time moving the chairs around their homes. This is not surprising because many hardwood rocking chairs can weigh as much as 40 pounds when fully assembled.Wooden rocking chairs can be difficult to clean.Many people cannot stand cleaning rocking chairs because most rocking chairs contain small crevices that require constant polishing and dusting. As a result, many people use other furniture items to compensate for this problem.Finally, wooden rocking chairs can be expensive to purchase.Many people think wooden rocking chairs can be expensive to purchase. This is a fair assumption because some custom-made wooden rocking chairs can cost several thousand dollars. As a result, many people opt to purchase other chairs for their home.For more information about wooden rocking chairs, please visit one of the reputable furniture dealerships in your area today. They can help you learn more details about wooden rocking chairs that can help you determine if purchasing a wooden rocking chair is worthwhile.
You can make a rocking chair out of recycled material. As for does it harm the environment? Id say there are bigger environmental problems than rocking chairs.
Rocking Chair Therapy will tell you the history and everything you ever wanted to know about rocking chairs. The rocking can appease the need to keep moving.