What does it feel like to sit on a couch and a chair? What is the reason for this

The softer the sofa is more comfortable, and the chair is comparatively harder.

People who have sat on the sofa chair generally have this experience: there is a comfortable feeling of sitting on the hair chair. Why is that?

There are three reasons: First, there is a stepping effect. The Shabi F-s hair cushion is made of fluffy substances such as hemp, brown, and sponge, and is equipped with a number of springs underneath.

In this way, the armchair is both soft and elastic. When a person sits on it, due to the action of gravity, the sofa cushion and spring are pressed down, and the soft material and spring are compressed, so that there is an upward elastic force on the human body. The human body is affected by the elastic force, which increases the time t (the time it takes to sit firmly from the first contact with the sofa cushion).

Root,、Sit on it, according to the pressure formula P = the person has a larger contact area with it。 where F is the gravitational force of the person. According to the kinetic t theorem, F

t2m· V gets F=m. V t is obviously F dragon small, the mountain knows this, the cushioning effect when sitting down makes people feel more comfortable sitting on the sofa chair. Second, it has a decompression effect.

The dry sofa chair is soft and shows that the human body is under less pressure, so it is more comfortable to sit on the sofa chair than on other hard benches. Third, there is a press. Function.

When people sit on the sofa chair and move a little, it will cause a small vibration of springs and soft substances, and the human body is subjected to the elastic effect of periodic changes, which is rich in a sense of comfortable rhythm, and this elastic force plays a massage effect, making people feel more comfortable to sit in the sofa chair.