Without going into great detail about the structural design or integrity of a simple chair, they have four legs because if they didn't we would fall over. Just as chairs need four legs that make them sturdy, usable and successful, web sites also need four legs to make them sturdy, usable and successful: Standards.
Explain why,on an uneven floor,a four legged stool will always wobble but a three legged stool will always be stable. Because a balance on two legs of a 3-legger would require the centre of gravity to be perfectly balanced between two legs i.
It's exactly the right number to define a flat surface or plane. It's impossible for a three legged table to wobble.
Tables with four legs can, and often do. If the four legs are uneven, or if the floor's not flat, the table will wobble — resting first on one set of three legs, then tipping to another. They are often found in traditional rooms with tatami mats, and are often used for relaxing under heated kotatsu tables. Think about the chairs in your home or office. Most probably have four straight legs , but some might have wheels or a swivel mechanism. The base of the chair is designed for its intended use.
As an example, rolling office chairs. For clearance, you should have at least a 0. The seat pan should be long enough to provide you with comfortable support for at least three-quarters of the length of the thigh. Theoretically, a 75 pound-rating per caster should support pounds on a 5-star chair base. However, during actual use full weight is not evenly distributed over all five casters for example, when moving from a chairmat onto another surface. Cheap casters often fail, especially when used by heavier people.
Three-legged tables have to be heavier than four-legged tables , however there is an advantage to having weight. If one accidentally bumps a light weight table, the drinks on the table tend to spill.
This three-legged specimen, like most of these so-called " turner chairs ," is thought to have been made in Wales or England sometime during to Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Why are four-legged chairs so common? Ask Question. Asked 5 years, 9 months ago. Active 5 months ago. Viewed 50k times. Or is it just a custom that started years ago and never changed? Improve this question.
Karnivaurus Karnivaurus 2, 2 2 gold badges 12 12 silver badges 16 16 bronze badges. But the statement is that a 3-legged chair is stable whilst sitting on the chair.
Here, stability is used as a binary term, rather than a continuous measurement. In this way, if you sit on a 3-legged chair in a typical manner, the chair will be stable. Show 5 more comments. Active Oldest Votes. Improve this answer. Kyle 6 6 bronze badges. John Rennie John Rennie k gold badges silver badges bronze badges. For example, if you have a table with legs of length 1m, 1m, 1m and 0. If you've got wonky legs your best option is a tripod unless your floor unevenness exactly counteracts your leg wonkiness of course!
I had things to do today! They are apparently used when milking cows. For a 2 legged chair, it is infinitely tippy along its tippy direction. So clearly that is a bad plan.
A 3 legged chair has half the stability along its tippy directions as it does along its long direction -- towards a "face" as opposed to a "corner". You can "splay" the legs to make up for it, or accept low stability. As an example, rolling office chairs. For a fixed radius Adding that 4th leg adds a whole bunch of stability. So 4 legs is the sweet spot between 0 and O. Yakk Yakk 3, 1 1 gold badge 10 10 silver badges 17 17 bronze badges.
Consider the infinte return! Though I'd imagine some people still manage to tip this particular type of chair. Add a comment. Since then, virtually all swivel chairs that I've seen have had five legs. Also if someone leans back on a 4 legged office chair, it is possible to put all the force on a single let. I can recall some fairly close calls on four-legged rolling swivel chairs. I suspect that someone doesn't like me. David Z Jean Valjean Jean Valjean 2 2 silver badges 10 10 bronze badges.
For certain what we would consider extreme alien! SRS 23k 8 8 gold badges 64 64 silver badges bronze badges. They typically have curved edges to the seat, or some curvature through the seat's surface. Traditionally, it makes sense that rectangular chairs were easier to manufacture, but modern rectangular chairs tend to be much more elegant in design, and so there is wasted after cutting.
A teapoy is an item of furniture. The word is of Indian origin, and was originally used to describe a three-legged table. A somewhat loglike shape is how most poop should come out due to its formation within the intestines. Key takeaways. Lots of people cry when they feel frustrated, angry, or embarrassed. When you get mad, your body produces a flood of hormones that stimulate strong reactions in your body — everything from a racing heart to sweaty palms to short-term memory loss.
In response to the elevated stress level, you may cry. Reflex: These are tears triggered by irritants such as wind, smoke, or onions. They are released to flush out these irritants and protect the eye. Emotional: Humans shed tears in response to a range of emotions. These tears contain a higher level of stress hormones than other types of tears.
Begin typing your search term above and press enter to search. Press ESC to cancel. Skip to content Home Philosophy Is having four legs sufficient for being a chair is it necessary?
Ben Davis January 14,
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