Why when tug of war, athletes don t want sand on the field

During tug-of-war, the sand under your feet is like a small wheel, and with a small wheel, it is more convenient to move. Principle: The dynamic friction coefficient between the shoe and the ground is larger than the dynamic friction coefficient between the shoe and a layer of sand, and it is also larger than the dynamic friction coefficient between the sand and the ground.

The greater the dynamic friction coefficient of the same mass, the greater the maximum value of the static friction between objects, the greater the static friction of tug-of-war, the better, with sand under your feet, the same pulling force becomes dynamic friction for people, and with dynamic friction, people can move.

In order to prevent accidents, sand is sprinkled with sand, because the dynamic friction coefficient between people or cars and sand is larger than that of people or cars on the ice surface, and the dynamic friction coefficient between sand and ice is also larger than that of people or cars directly touching the ice surface.

In short, after the interaction force of different kinds of objects is in contact, there are different dynamic friction coefficients between them, and the larger the coefficient, the less likely they are to move each other, and the interaction force is manifested as the static friction of the object, that is, the force is not moving. On the contrary, the more likely it is to move each other, the interaction force is manifested as dynamic friction, that is, moving by force.

There are many examples of kinetic friction coefficients in life, some need it to be large, and some need it to be small. When you think about it, you'll be enlightened. If there's anything you don't understand, just add me.

The purpose of the tug-of-war is to dial the opponent over, but when you dial the opponent, because the force is mutual, so you may also dial yourself when you tug the river, you can imagine the appearance of wearing roller skates to dial the river, as soon as you dial it, you will dial yourself over, so if there is sand on the ground, as soon as you exert force here, you will dial yourself over, and the greater the force you use, the greater the possibility of losing. It is on the basis of these characteristics that tug-of-war cannot become an Olympic sport.

Tug-of-war is more than the friction under the feet, there is sand will reduce the friction, and the snow is sprinkled with snow agent.

There is no friction on the ground with sand, and if you fall, you will be injured.

That's it. With sand, the coefficient of friction between the foot and the ground is reduced, and the friction is reduced.

However, snow is different from the ground, snow is inherently smooth, and if sand is sprinkled, the sand will be thrown on the snow, which increases the coefficient of friction, and the friction also increases

No more falling.

The sand is round, and it hurts to fall to the ground, and it hurts to be slippery and painful, and of course the team members will not like it.

Try it yourself and find out why.

Fell to his death.

Also, it doesn't hurt more if you fall

Summary. In fact, this is to say that sprinkle some fine sand on the icy road, at this time, the friction is increased, and the sand rolling friction is greater than the sliding friction of the ice surface, because the ice surface is too smooth but the sand particles under the feet reduce the friction during the tug-of-war, and the sand friction is greater than the ground sliding friction, but if you step on the beach tug-of-war, the sand has no effect.

Why tug-of-war athletes step on sand under their feet to reduce friction, while sprinkling sand on ice increases friction.

Hello, this is because the static friction is generally under the feet of the trafford during the tug-of-war, and after the sand is sprinkled, the static friction becomes sliding friction (and it is also likely to become the rolling friction partner), and the rolling friction is much smaller than the maximum static friction Sprinkled sand on the ice will increase the friction of the Mo, because the friction factor of sand is still much larger than that of ice, but if you are tug-of-war on the ice sprinkled with sand, you will still feel very slippery.

The sand rolling friction is greater than the sliding friction of the ice surface, because the ice surface is too light to attack the Hui chain slippery but the sand particles under the feet reduce the friction during the tug-of-war, and the sand friction is greater than the ground sliding friction, but if you step on the beach and pull out the Sun River, the sand has no effect.

1.It's definitely a money-saving exercise. Buy a thick hemp rope, there is basically no venue limit, and you can start the game as soon as you say hello.

2.It's a great team activity. Now whether it is school or work, we pay attention to team spirit, but after work, everyone rarely likes things with a lot of exercise, so there are fewer tug-of-wars, unless it is time to do quality development.

3.It's a 10,000-year-old trick for teachers. It's not easy to come up with an activity that is suitable in all aspects, and it's hard to have a good event, although it's a little old-fashioned, but it's passed down from generation to generation

Tug-of-war is more than just a competition! We can think of it as a kind of cultural exchange, regulating the body and mind through activities, stretching muscles and bones, etc.!

a. There is sand on the ground, which cannot change the roughness of the ground and does not conform to the theme b. There is sand on the ground, and the sand particles are equivalent to balls, so that rolling replaces sliding and reduces friction, so the ground does not want sand to prevent rolling friction in line with the topic

c. The athlete's pull on the rope is related to the athlete, and has nothing to do with whether there is sand on the ground

d. The pressure of the athlete on the ground is related to the weight of the athlete, and has nothing to do with whether there is sand on the ground

Therefore, choose B

Analysis of Wang Senqing] The convex and concave pattern of the sole of the new sneaker is not worn, which can increase the roughness of the contact surface and increase the friction. The sand is small and smooth, and it is easy to roll when you step on it, which will reduce friction. 【Reviews】 A reminder:

Sprinkling spring finger sand on rough hard ground will reduce friction. However, if you sprinkle sand on the already slippery muddy floor, the roughness of the contact surface will increase and the friction will increase. So pay attention to the relativity of thinking about the problem.