Why does it hurt to hit the table with your hand, about the puzzle master enters!!

I think so: there is a velocity when the hand hits the table, and the velocity immediately decreases to zero, which means that the table gives your hand a force to cause it to accelerate in the opposite direction and slow down.

Hehe! The question asked by the landlord is really humorous, why does it hurt when people slap the table, this question is too interesting, since the landlord knows that the effect of this force is mutual, then I don't need to explain it with physical principles. Think about it, if a person doesn't feel the nerve endings, then does it hurt if he slaps the table?

No, in other words, if a body receptor receptor afferent nerve and outgoing nerve, central nervous system and cerebral spine are fine, then he will feel pain when he slaps the table.

But when you slap the table with your hand, you have a downward force on the table, and at this time the table is slightly deformed (but not visible to the naked eye), and an upward reaction force is generated, so that your hand is affected by the reaction force of the table on you, and through the action of the nervous system, you will feel pain. This is also the application of Newton's third law (action and reaction).

The hand gives the table a force, and the table also gives your hand a reaction force that is greater than your hand can handle, so you feel pain.

According to Newton's third law, action and reaction, if you give a force to any object, it must give you a reaction force of the same magnitude. You slap the table with your hand and put force on the table, and the table will give you the same force as much force. The acting force and the reaction force are always equal in magnitude Opposite directions Acting in a straight line The acting and reacting forces act on different objects The acting and reactive forces exist and disappear at the same time The acting and reactive forces are forces of the same nature.

First of all, when two objects (the hand is considered an object) interact with each other and are deformed by extrusion, a force is generated. When your hand touches the table, give it a force, because of the force, the table will be deformed, but the table has a tendency to return to its original shape, so there is an upward force on the micro level to restore its own shape, because contact with your hand will in turn produce an elastic force on your hand. So when you receive the elasticity of the table, you will naturally feel pain.

The level of pain is related to how fast you hit the table (this is a question about impulse). This is known as the interaction force.

You slap the table with your hand and give the table a downward force, because the force is mutual, and the table gives you an upward reaction force, and the palm of your hand hurts when you are squeezed by the force.

You slap the table with your hand and give the table a downward force, because the force is mutual, and the table gives you an upward reaction force, and the palm of your hand hurts when you are squeezed by the force.

But when you slap the table with your hand, you have a downward force on the table, and at this time the table is slightly deformed (but not visible to the naked eye), and an upward reaction force is generated, so that your hand is affected by the reaction force of the table on you, and through the action of the nervous system, you will feel pain. This is also the application of Newton's third law (action and reaction).

The effect of the force is mutual, the hand hits the table, the table will also exert a force on the hand, and the force object that hurts the hand is the table, otherwise it will not be the hand itself, hehe.

This refers to the phenomenon of "hand pain", and the hand feels pain because it is subjected to the force of the table, so the object of the force is the table. If there is only the phrase "slap the table with your hand", then the object that does not exert force is the hand.

The hand first exerts a force on the table, and the force between the objects is reciprocal, so at the same time the table also gives the hand a force, and this force is the force that makes the hand feel pain.

This is because:

According to Newton's second law, the table gives a reaction force to the hand while being subjected to the force exerted by the hand, so the hand also feels pain.

The above phenomenon shows that the interaction between objects is reciprocal.

Conservation by impulse.

MV=FT mass m certainly.

Your hand has a velocity v

Hand slapping the table v drops to 0 in a very short time (t is about f is the force of the hand on the table.

v is proportional to f.

The greater the v, the greater the f.

by Newton's second law.

The action force and the reaction force are always equal in magnitude and opposite in direction, acting on the same straight line, the greater the reaction force f of the hand.

It is because when the hand pats the table, the hand gives the table a downward force, and the table produces an upward force at the same time, which is Newton's second law, action and reaction force. When a force is generated, there is an opposite force.

Newton's third law, not the second. To put it simply, the action of force is mutual.

It doesn't seem to be a problem with the game. Is it a mistake to post.

The action of force is reciprocal, the third law of Newtonian mechanics.

Why don't you shoot the cactus and see which one is awesome, haha.

I think the psychological factor can carry a lot of weight, and I recommend that you relax! Assertive! You have no obvious organic disease.

To find a way out for your future, you can only rely on yourself:

If the heart changes, the attitude changes;

When attitudes change, habits change;

When habits change, life changes.

Time is a great author, and she can write the ending of the future.

It doesn't matter, it won't hurt if you hit it a few more times.

It's no wonder it doesn't hurt, unless your walls are made of cotton.

When you are angry, you must learn to regulate and don't vent your body.

Does it still hurt? Unlikely. At best, I'm just bleeding on my knuckles.

Personal habits Just pay attention to it in the future.

Lack of reason, self-control, and a cool head.

Buy a sandbag and hit it, just like me.

Since it's all in good condition, there's no reason why you can't fight it, how about the friction between the flint and the wheel? Is it easy to spark? And how about the volatilization of oil? If you don't care about volatilization, it doesn't seem to be easy to use imported oil?

First of all, please see if you use fake oil, if you exclude fake oil, see if the steamer fires the spark? According to your description, it should be a hot wheel problem, and it has only been used for about two months, and it should have little to do with the line.

**It's not cheap, if everything is suitable, it is recommended to remove the pulley, quench it and then install it, it should be fine. It shouldn't have anything to do with flint and oil.

You can pull out the Zippo fire movement first.

Then flip to the bottom. .Underneath there is a golden screw-like one.

That's to adjust the tightness of the flint.

It can be adjusted this way. Look at your degree. Can be adjusted to the most comfortable. .

Muscle strain It is recommended that you continue to exercise so that the arm muscles will adapt to the high-intensity force stretch and will not cause muscle strain due to sudden and vigorous stretching