Use mechanics to explain why the tumbler doesn t fall

The tumbler does not fall down and has to do with its overall structure. The whole body of the tumbler is very light, but there is a relatively heavy piece of lead at the bottom of it, so the weight of the whole tumbler is almost concentrated at the bottom, that is, its center of gravity, which is the point of action of the resultant force of gravity on the object, is very low. On the other hand, the underside of the tumbler is hemispherical, so it is easy to swing.

When the tumbler is tilted to the side, its fulcrum, which can be said to be the contact point between the tumbler and the desktop, will also change, and at this time, the focus will not be in the same straight line as the fulcrum. In order to return to its original position, the tumbler will swing around the fulcrum under the influence of gravity until it stops. The greater the tilt of the tumbler, the greater the horizontal distance between the fulcrum and the center of gravity, the greater the amplitude of the tumbler's swing, and the more significant it will be when it wants to return to its original position.

So, no matter how much you push, the tumbler will not fall. In fact, for any object, the lower the center of gravity and the larger the base area, the more stable it is. For example, a half-filled bottle of water is also stable, while an empty bottle or a bottle full of water is prone to tipping over; Bricks that are laid flat are more stable than bricks that are erected, which is why people always put heavy things underneath and light things on top when pushing and placing objects.

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.

One of the toys that we often play with when we are children is the tumbler.

When I was a child, I didn't understand why the tumbler couldn't be pushed down. In the TV with a lot of a-dreams, Big Bear found the tumbler after a failure, and then remembered the story with his grandmother, and later the grandmother also hoped that the child could become a tumbler, even if he encountered more difficulties, he could still stand up firmly.

So at that time, I hope that I can become a tumbler, no matter how many difficulties I encounter, I can stand up bravely, and then we will take a look at the principle of the tumbler, and the children who like it can also try to use this principle at home to make a tumbler of their own.

First of all, the reason why the tumbler does not fall is because most of the center of gravity of the tumbler is at the bottom, and when the tumbler is about to fall, the force of the center of gravity will pull him back. Secondly, we will find that the bottom of the tumbler is round, because the prototype has friction relative to other shapes.

Least. If the friction is small, the tumbler needs to move relative to the obstructing object.

The power is reduced, so the power of the tumbler can be recovered to the maximum.

The last thing we need to know is that, according to the principle of leverage, when the tumbler falls, because the center of gravity is at the bottom, the tumbler will return to its original place because of the large distance between the end of the base.

The above is the reason why the tumbler will not fall, so if you want to make a tumbler, you need to first grind the bottom of the object into a semicircle, and then try to put the center of gravity of the object on this semicircle, and also ensure that the surface of the semicircle is smooth. In this way, the production of the tumbler can be guaranteed to be successful to the greatest extent. You can make your own tumbler based on your favorite anime character or idol, and of course, you can also write your wishes or what you want to say on the tumbler.

When you feel lost and confused, just take a look at this tumbler, and maybe it can give you the strength to get back up.

The principle of the tumbler does not fall is that the object that is light at the top and heavy at the bottom is more stable, that is, the lower the center of gravity, the more stable. So when the tumbler is erected, the distance between the center of gravity and the contact point is the smallest, and the center of gravity is the lowest. Ability to maintain stability.

Because the bottom is very heavy, and the design is elliptical, so some of the center of gravity is always in the middle.

The center of gravity of the tumbler is very low, so that the balance will be maintained, and no matter how much the tumbler pushes him, he will not fall.

Because there is an iron object at the bottom of the tumbler, because the bottom of the tumbler is very heavy, it can keep the tumbler in a balanced state.

There is a certain principle, and the tumbler is round, and the most important thing is that the upper and lower weights can be said to be very stable, and the center of gravity is also very stable.

Because the structure of the tumbler is light at the top and heavy at the bottom. The center of gravity is relatively low, so it is relatively stable.

There will be some heavy items in the tumbler, which will cause the top to be light and the bottom heavy, so this situation will occur.

Using the principle of light on the top and heavy on the bottom, the tumbler will not fall no matter how it swayes, and the tumbler is a very fun toy.

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 the "cone rolling" experiment we saw in the Science and Technology Museum, which 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.