How does a tumbler work? The principle of why the tumbler does not fall

The tumbler principle.

Objects that are light at the top and heavy at the bottom are more stable, which means that the lower the center of gravity, the more stable they are. When the tumbler is in equilibrium in the upright state, the distance between the center of gravity and the point of contact is minimal, that is, the center of gravity is the lowest. After deviating from the equilibrium position, the center of gravity is always raised.

Therefore, the equilibrium of this state is a stable equilibrium. So no matter how much the tumbler swings, it always doesn't fall.

Another example is our presence in the Science and Technology Museum.

The "cone roll-up" experiment is also the same reason, because of the shape of the cone and the shape of the tracks on both sides, its center of gravity is falling, but it looks as if it is rising, and rolling up is not in line with the facts in life.

But it is only an illusion, and when you see its essence, the center of gravity is lowered, so the lower the center of gravity, the more stable it is. In order to increase the stability of objects in life, we often use to increase the weight underneath, such as electric fans.

Bases, microphone stands, bus stop signs, etc.

The tumbler principle.

1.An object with low potential energy is relatively stable, and the object will definitely change towards a state with low potential energy.

When the tumbler falls, the base where most of the center of gravity is concentrated is raised, causing the potential energy to increase, so the tumbler has to return to its original position.

2.From the principle of leverage, when the tumbler falls, the point of action of the center of gravity has been at the end, regardless of the fulcrum in the **, although the arm of the base is shorter, but the moment force arm, the tumbler will still return to the original position because of the large moment at the base.

3.In addition, the bottom is round, and the friction is small, which is convenient for the tumbler to return to its original position.

You haven't seen a Rubik's Cube tumbler, what is the principle of this? I doubt my IQ!

Cat fairy sees the world: 22-year-old college student built a "tumbler" bicycle and ran it by himself without being ridden.

TumblerThe reason why it does not fall is partly because the whole body of the tumbler is very light, only at the bottom of it there is a heavier thing (a block of lead or iron) and, as a result, it has a low center of gravity.

On the other handWhen the tumbler is tilted to one side, the center of gravity and the fulcrum are no longer on the same vertical line due to the change of the fulcrum (the contact point with the table), and the action of gravity will cause it to swing around the fulcrum, so that the tumbler will return to its normal position

The greater the tilt of the tumbler, the greater the horizontal distance between the fulcrum and the center of gravity, and the more the swing effect of gravity will increase, the more significant the tendency to return it to its original position, so the tumbler will never be pushed down.

In simple vernacular, it is:Objects that are light at the top and heavy at the bottom are more stable, that is, the lower the center of gravity, the more stable they are. So no matter how the tumbler "falls", it will always "get up" again.

The origin of the tumbler

Back in matriarchal societies.

The ruins of Banpo Village in Xi'an.

A kind of kettle was excavated. When the kettle is filled with water, it tilts to one side and automatically stands up when it is filled, making it easy to draw water.

In the pre-Qin period.

This kettle evolved into a kind of "drinking vessel", "Xunzi".

, Confucius.

Visit Lu Huan Gong Temple, see the "drinking vessel", and ask what it is. Temple Keeper: This is a drinking utensil placed on the right side of the seat, and it is very ingenious: when it is not filled with wine, it is inverted, and if it is moderately filled, it will stand up, and if it is too full, it will be poured.

After Confucius's "click", later generations put this kind of thing on the right side of the seat, used to remind themselves to be moderate and dissatisfied. Hence the "motto."

word. According to research, these things use the principle of a light-headed center of gravity, which is the predecessor of the tumbler.

Because it has a low center of gravity and a low center of gravity, it will not fall.

The working principle of the tumbler is to deviate the line of action of gravity away from the fulcrum, so that the gravity produces a moment on the fulcrum, that is, the resistance distance. As the tilt angle of the tumbler continues to increase, the offset of the gravitational action line increases, and the resistance torque also increases, and finally the balance with the external moment is realized, and the ability of the tumbler to resist the interference of external force and maintain balance is formed in this way.

From the principle of leverage, when the tumbler falls, the point of action of the center of gravity has been at the end, regardless of the fulcrum in the **, although the arm of the base is shorter, but the moment force arm, the tumbler will still return to the original position because of the large moment at the base. In addition, the bottom of the tumbler is round, and the friction is small, which is convenient for the tumbler to return to its original position.

Objects that are light at the top and heavy at the bottom are more stable, which means that the lower the center of gravity, the more stable they are. When the tumbler is in equilibrium in the upright state, the distance between the center of gravity and the contact point is the smallest, that is, the center of gravity is the lowest. After deviating from the equilibrium position, the center of gravity is always raised.

Therefore, the equilibrium of this state is a stable equilibrium. So no matter how much the tumbler swings, it always doesn't fall.

Tumblers we have seen since we were very young. Some children even use the tumbler as a toy. But tumblers are also easy to make people wonder, why don't tumblers always fall?

How does this work? The reason why the tumbler is not is due to the structure of the tumbler. The tumbler has a lighter upper part and a heavier lower part.

It is also because the bottom of the tumbler is a piece of iron with a heavier mass that causes the center of gravity of the tumbler to be lower, so that the tumbler does not fall. From another point of view, the bottom of the tumbler is large and round, when the tumbler tilts to a certain side, the position of the table top and the center of gravity are not in the same straight line, at this time, under the action of the gravity of the tumbler, the tumbler will start to swing, but even then it will not fall.

1. As for the reason why the tumbler does not fallIn physics, we usually call the state in which an object is at rest as equilibrium. In equilibrium, it can be divided into stability balance and instability balance. The tumbler is a balance of stability.

The main reason why the tumbler can not fall is because of the large iron block at the bottom of the tumbler. It was this large piece of iron that lowered the center of gravity of the tumbler all at once. Therefore, the center of gravity is low, so the tumbler is very stable.

In fact, the stability of an object mainly depends on two aspects. First of all, the first aspect is the height of the center of gravity of the object. The second one has to do with the size of the area of the supporting object.

Second, the reason for the constant swing of the tumblerWe can find that the bottom of the tumbler is round, and then the center of gravity of the tumbler is relatively low. If you tilt the side of the tumbler, a moment will be created between the tumbler's gravity and the point where it lands. Because of this moment, the tumbler will keep swaying.

3. Overview of tumblers Although we understand the principle of the role of the tumbler, some people will still ask, does the tumbler really not fall? In fact, generally speaking, under natural conditions, tumblers will not fall.

The tumbler can not fall, because the material at the bottom of the tumbler is relatively heavy, the principle of the tumbler is made by using the earth's gravity, the bottom weight of the tumbler is heavier than the head, and it will not collapse due to the action of gravity.

The tumbler is particularly stable because there is a large iron block at the bottom of the prototype, which makes it have a large support surface and a low center of gravity, and the bottom is generally round, so a moment will be generated after tilting, so the tumbler will return to its original state.

TumblerThe center of gravity is in the center of the objectNo matter which way it is dumped, it will not shift the center, and as long as the center of gravity can maintain its original position, it will not fall, and it is called a tumbler.

1. The object with low potential energy is relatively stable, and the object will change to the state of low potential energy, when the tumbler falls, because the base that concentrates most of the center of gravity is raised, the potential energy of the spring mold increases, so the tumbler returns to the position of the original chop hall;

2. From the principle of leverage, when the tumbler falls down, the point of action of the center of gravity has been at the end, although the force arm of the base is shorter, but the moment is equal to the product of the force and the force arm, and the tumbler will still return to the original position because of the large torque at the end of the base;

3. The bottom is round, and the friction is small, which is convenient for the tumbler to return to its original position.

The tumbler principle.

1. Objects that are light at the top and heavy at the bottom are relatively stable, that is, the lower the center of gravity, the more stable. When the tumbler is in the upright state and balanced, the distance between the center of gravity and the contact point is small, that is, the center of gravity. If it is not in a balanced position, the center of gravity is always elevated.

Therefore, the balance of this state is a stable balance, so no matter how the tumbler swayes, it will not fall.

2. The common tumbler is a paper body and a mud bottom, that is, it is formed with a pulp filling mold, and then a semicircular base is made of clay, and the two items are glued, and then the surface is pasted with clean paper, and the outside is painted.

3. The tumbler is a hollow shell, the weight is very light, the lower body is a solid hemisphere, the weight is very large, and the center of gravity of the tumbler is in the hemisphere.

4. There is a contact point between the hemisphere below and the bearing surface, when the hemisphere rolls on the bearing surface, the position of the contact point will change, and the tumbler will always stand on the bearing surface with a contact point, so it will always be a one-legged body.

The practice of tumblers

1. Prepare the materials needed to make tumblers first. Prepare plasticine, eggshells, scissors, colored paper, pens, glue sticks, compasses, etc. The edges of the eggshell should be neatly aligned, and the small end of the eggshell should be punched.

2. Then draw a prototype with a compass with a radius of about 3 cm on colored paper, cut out the drawn prototype with scissors, cut out the circle, and carefully answer a right-angled fan on the top of the circle, which is a quarter of the area of the prototype.

3. On the remaining three-quarters of the circle after subtracting, use a glue stick at the edge of the fan-shaped edge just now, pay attention to the uniform coating, do not paint too little, otherwise it will be difficult to stick.

4. After applying the glue, glue the two edges of the remaining circle together to get a hat-shaped cone, which is the small hat of the tumbler.

5. Take a little plasticine and put it in the eggshell, this process should be done slowly, otherwise the eggshell will be broken, and the plasticine does not need to be stuffed too much, otherwise the tumbler will not be able to stand.

Why don't tumblers fall

1. For any object, the larger its base area, the lower the center of gravity, the more stable it is, and the less likely it will fall down. The tumbler's entire body is light, but it has a heavier piece of lead at the bottom, so it has a low center of gravity.

2. In addition, the bottom surface of the tumbler is very wide and smooth, when the tumbler is tilted to the side, the center of gravity and the desktop contact point are not on the same plumb line, and the action of gravity will make him swing.

3. When the tumbler tilts to the left, the center of gravity is on the right side of the contact point, and the tumbler will fall to the right under the action of gravity; When the tumbler tilts to the right, the center of gravity goes to the left of the contact point, and the tumbler falls to the left.

4. The greater the amplitude of the tumbler's inclination, the more obvious the swing, the energy will continue to lose during the swing, and when the energy is not, the gravity line is just wide and high above the contact point, and it will stop swinging.