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The force of the two teams pulling the rope is not an action force or a reaction force. The action force and the reaction force are the actions between two objects. Because the rope has mass, then its middle part is regarded as an object, which is actually a balance problem under the tension of both sides of the object.
Most of the textbooks idealize the rope, so there is no mass, and it directly becomes that the interaction between the two teams is not very tight.
There are many factors of this, the main factor is that people should try to make themselves subject to the maximum static friction given by the ground (related to the tilt angle of the person, the sole pattern, etc.), and use the tension of the rope to balance this friction, so that the rope is subjected to a force equal to the maximum static friction of the ground by the size of the person. (That's the key). Everyone will pull the rope with the force equal to the maximum static friction under the feet, and the final comparison is the strength of the two teams to pull the rope, whoever has the rope will go that way.
The small ones will slide under their feet.
If a person does not pull the rope backwards with force, he just holds it tightly, and he cannot make a large friction force under his feet, so the force of pulling the rope must not be the maximum force. As a result, the overall side pull is not maximized. It's easy to lose the game.
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In the tug-of-war between teams A and B, team A is subjected to gravity, support, static friction and rope tension, while team B is subjected to the same force as team A. The rope is subjected to two forces (ignoring gravity), namely the pull of A on the rope and the pull of B on the rope, when the rope moves very slowly, it can be seen as a uniform linear motion, and these two pulling forces are a pair of balanced forces, equal in magnitude. According to Newton's third law (i.e., when object A gives a force to object B, object B must also give object A a reaction force, and the force and the reaction force are equal in magnitude, opposite in direction, and in the same straight line), the pull of A on the rope and the pull of the rope on A are a pair of interaction forces, equal in magnitude, and the pull of B on the rope and the pull of the rope on B are a pair of interaction forces, equal in magnitude.
Therefore, for two teams in tug-of-war, how much pull A exerts on B, B also exerts an equal amount of pull on A. Since the magnitude of the pull force on both sides is equal, it should not be possible to distinguish the winner from the loser, and in fact one side always wins. It can be seen that the pull between the two sides is not the factor that determines the victory or defeat.
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Success or failure is the degree of inclination, and the maximum pull force is the highest and the most extreme at 45 degrees.
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In physical education class, the teacher told everyone that they were going to have a tug-of-war competition. When the students heard this, they cheered, and they all started warm-up exercises.
After a while, the tug-of-war competition that the students were looking forward to began lively. Xiao Rong and Xiao Min each led a few children, their hands holding the rope tightly. only listened to the referee's order, and the members of the Xiaorong team let the traces of the Sui use their strength one by one, and the state tremors of the Xiaomin team were not to be outdone, and used their whole body'Strength.
The two groups of players kicked their feet on the ground hard, leaned back, and pulled the rope Tambu hard. I saw that their faces were flushed, and beads of sweat the size of beans kept seeping out. The cheerleaders were also happy, some stood next to the Xiaomin team to cheer and cheer, and some stood next to the Xiaorong team and shouted and cheered.
Suddenly, the members of the Xiaorong team roared and violently dragged their opponents to the ground. "Team Xiaorong has won! ”
The whole playground was filled with a joyful atmosphere.
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First, don't wear gloves. This is because wearing gloves makes the hands slippery, and the inability to use force will cause blisters and broken skin on the palms.
Second, wear rubber-soled rain boots to increase the friction between your feet and the ground. Among all footwear, rubber-soled rain boots have the highest friction coefficient with the ground. Because the rain boots themselves are designed to be non-slip on rainy days.
Third, during the tug-of-war, command all the team members to fall backwards on their backs at 45 degrees, or even a little more. And during the tug-of-war, everyone should always maintain such a posture. This is because this allows you to use not only the strength of your legs, but also the weight of your body.
Fourth, those who participate in tug-of-war should choose a large weight first (refer to Article 3). And the one with the greatest weight must be the one who grabs the rope last. The most important thing to grasp the rope tail is to keep it stable and don't shake.
If you ask me if there is a scientific basis, I tell you that this is the know-how taught by our university mechanics professors. This is how our class won the whole school championship.
Tug-of-war competition generally uses round-robin and knockout round-robin, there are many teams, you can also use strong hand competition, only three teams use round-robin to determine the serial number, draw lots first to determine the serial number, according to 1 3, 3 2, 2 1 pull out three times, the winner will accumulate 2 points, the loser will add up the two results of each team, the number of points will be ranked first, the points of the two teams will be equal to see who wins, the winner will be ranked first, the points of the three teams are equal, and the score loss rate will be seen, that is, the number of times the team wins twice divided by the number of negative times, and the higher quotient value will be ranked first.
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