What objects naturally slow down because of friction?

Answer 1

DevicesDevices such as wheels, ball bearings, roller bearings, and air cushion or other types of fluid bearings can change sliding friction into a much smaller type of rolling friction.

Many thermoplastic materials such as nylon, HDPE and PTFE are commonly used in low friction bearings. They are especially useful because the coefficient of friction falls with increasing imposed load.[citation needed] For improved wear resistance, very high molecular weight grades are usually specified for heavy duty or critical bearings.

LubricantsA common way to reduce friction is by using a lubricant, such as oil, water, or grease, which is placed between the two surfaces, often dramatically lessening the coefficient of friction. The science of friction and lubrication is called tribology. Lubricant technology is when lubricants are mixed with the application of science, especially to industrial or commercial objectives.

Superlubricity, a recently-discovered effect, has been observed in graphite: it is the substantial decrease of friction between two sliding objects, approaching zero levels. A very small amount of frictional energy would still be dissipated.

Lubricants to overcome friction need not always be thin, turbulent fluids or powdery solids such as graphite and talc; acoustic lubrication actually uses sound as a lubricant.

Another way to reduce friction between two parts is to superimpose micro-scale vibration to one of the parts. This can be sinusoidal vibration as used in ultrasound-assisted cutting or vibration noise, known as dither.

Answer 2

It should be clarified that the coefficient of friction does not depend just on a single object, but on both objects that are in contact.Glass and wet ice tend to have a fairly low friction, when in contact with many different other objects.

Answer 3

Sand paper, no-slip soles (of shoes), no-skid backing on throw rugs, car tires and a dry road surface

Answer 4

Friction exists in all contact forces. If two objects are touching, any two objects at all, and one object is moved, friction is the result in between those two objects.

Answer 5

scateboards cars slides and tennis and lots of sports

Answer 6

Objects with a rough surface area. Air will pass over a rough area unevenly, creating friction. Smooth objects such as pebbles have less friction as air passes smoothly over them.

Answer 7

- Objects with a rough surface area

Answer 8

two objects that rub agaisnt each other