Question

Почему сила трения не будет равна нулю при скольжении тел с идеально отшлифованными (гладкими) соприкасающимися поверхностями?

Answer 1

Ответ:

Объяснение:

Потому что вступает в силу межмолекулярное взаимное притяжение молекул соприкасающихся поверхностей.

Answer 2

Why is the force of friction not zero when objects have perfectly smooth surfaces and are sliding against each other?

The force of friction is not zero when objects have perfectly smooth surfaces and are sliding against each other because even smooth surfaces still have microscopic irregularities and imperfections. These imperfections create interlocking points of contact between the surfaces, leading to friction.

When two objects slide against each other, the irregularities on their surfaces come into contact and create resistance. This resistance is known as friction. Friction occurs at the atomic level, where the atoms on the surface of one object interact with the atoms on the surface of the other object. These interactions result in a force that opposes the motion of the objects.

Even though the surfaces may appear smooth to the naked eye, at a microscopic level, there are still imperfections that prevent the surfaces from sliding perfectly against each other. These imperfections can include roughness, asperities, or even microscopic contaminants. These irregularities create frictional forces that resist the motion of the objects.

In addition to the microscopic irregularities, other factors can contribute to friction, such as adhesion forces between the surfaces and the presence of lubricants or fluids. These factors further prevent the surfaces from sliding smoothly against each other.

Therefore, even with perfectly smooth surfaces, the force of friction will not be zero due to the presence of microscopic imperfections and other factors that contribute to friction.