In the tug-of-war, let's first analyze several decisive situations:

1, the losing team is pulled to stand up and then thrown forward;

2. The losing team was pulled "intact";

3. The comprehensive situation of the above two situations.

In the first case, because the moment with the foot as the axis point is small, people are pulled to "turn" under the pull of the other side, so the foot is forced to move forward and finally lose the game.

The second situation: because the friction between the foot and the ground is not big enough, it is pulled "intact"-the foot rubs the ground-and finally loses the game.

The third situation: it is not difficult to draw a conclusion by analyzing the above two situations.

In tug-of-war, athletes always lean backwards-to maximize the ground friction into tension on the rope.

As the source of force, there is no doubt that it comes from the weight of athletes and the friction coefficient between soles and the ground. But this is only the premise. Only by transforming this premise into the tension on the rope can we win. And the trick is: how to maximize this transformation!