Of the various types of friction, which has the maximum value between two surfaces in contact? (2024)

FAQs

Of the various types of friction, which has the maximum value between two surfaces in contact? ›

Of the various types of friction, static friction has the maximum value. It must be overcome before an object starts slipping on a surface. Q.

Expert-Verified Answer

The force of friction is maximum when the surface is on the point of motion. There are two friction: Kinetic friction and static friction.

In summary, the surfaces with the highest coefficient of friction are rubber on dry concrete and rubber on steel due to their rough textures and the strong grip they provide.

The friction that exists between two surfaces in contact, when there is no relative motion between them, is known as​ static friction. It is a self-adjusting force.

The maximum or limiting value of friction between two surfaces is FMAX=μR F MAX = μ R where μ is the coefficient of friction and R is the normal reaction between the two surfaces. The coefficient of friction is a measure of the roughness of the surface - the rougher the surfaces the larger the value.

The maximum value of frictional force is called limiting friction. If the force on an object exceeds the limiting friction, then the object comes in state of motion.

Equal to twice the area of surface in contact. independent of the area of surface in contact.

For all the materials tested, silicone has the highest coefficient of friction (0.61 ±0.21), while nylon has the lowest friction (0.37±0.09).

Static friction is the strongest, followed by sliding friction, and then rolling friction, which is the weakest.

A rough surface will have more friction because on the rough surface there will be more irregularities. They will cause interlocking which in turn creates more frictional force. For a smooth surface, irregularities and interlocking is less and hence has very less friction.

What friction occurs between 2 surfaces? ›

Static Friction:

The frictional force between two surfaces in attempting to slide one object across the other but neither objects are moving with respect to each other. The friction is always equal to the net force parallel to the surface.

The correct answer is Roughness. Friction is occurred because of the irregularities in the middle of two surfaces in contact. More the irregularities, the larger the roughness and the friction in the middle of the two surfaces. Because of that, the frictional force is more in the middle of rough surfaces.

Frictional force always acts parallel to two planes in contact with each other and in a direction opposite to that of relative motion of the two bodies.

Of the various types of friction, static friction has the maximum value. It must be overcome before an object starts slipping on a surface.

Friction is caused by interlocking of irregularities present on the surfaces in contact. Rough surfaces have larger irregularities while smoother surfaces have lesser irregularities. Hence, rough surfaces offer more friction as compared to smooth surfaces.

coefficient of friction, ratio of the frictional force resisting the motion of two surfaces in contact to the normal force pressing the two surfaces together. It is usually symbolized by the Greek letter mu (μ). Mathematically, μ = F/N, where F is the frictional force and N is the normal force.

Frictional force is the force generated by two surfaces that contact and slide against each other. A few factors affecting the frictional force: These forces are mainly affected by the surface texture and the amount of force impelling them together.

It's sometimes assumed that coefficient of friction (COF) has a maximum theoretical and practical value of 1.00. This isn't true; there is no maximum. It is true that values exceeding 1.00 are so slip-resistant that their actual value is often of little interest.

The materials with the highest coefficients of friction are typically rough and coarse surfaces, such as sandpaper, rubber, and asphalt. These materials have a high level of surface roughness, which increases the amount of friction between them and another surface.

Static friction acts on objects that are not moving. It is the strongest type of friction.