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There can be a number of reasons. Some have to do with the Van der Walls forces between the molecules of the surfaces, some have to do with other forces like air pressure on two glass plates causing great friction between them.

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16y ago

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Why do use powder on a carom board?

the main reason for doing so is that the surface becomes smooth n in terms of science to reduce "friction" that wud exist between the board n the striker due to which it will move more swiftly with lee deployment of power..!!


How does teflon work?

Teflon works by having a very low coefficient of friction, which makes it highly resistant to sticking. This is due to its molecular structure, which prevents other substances from adhering to its surface. Teflon is commonly used as a non-stick coating in cookware for this reason.


Why do your breasts hurt after running?

because of the friction created between the t-shirt and the nipples....


Is The weight of the vehicle on the road surface is the reason that your car remains stationary when parked even on a steep hill?

Friction of the tires on the road surface ( I think so)


How and where is friction used in a bicycle?

Friction occurs in any relative motion. The rougher the surfaces in contact, the higher the friction between them. In a bicycle, friction is what makes it move when you pedal. There is friction between your foot/footwear and the pedal. That is why a bicycle pedal is rarely a smooth surface. Your foot shouldn't slip off it. The handlebars are also rough so that the friction prevent your hands from slipping off while riding. The seat is made of rubber or a similar material usually as it is rougher and softer than a metal or wood, reducing sliding on the seat. Friction between the tires and the ground is what makes the bicycle move. That is the reason why a worn out tire is more likely to skid on the ground, and also the reason why mountain bikes and bikes built for rougher terrain have deeper and better designed grooves on their wheels to create more friction and thus more traction.


What is the reason for skidding?

Skidding is the result of loss of traction or excessive friction. If you attempt to suddenly stop a moving object on a slippery surface, the friction from the surface is no longer acting upon the object. Instead, the object is floating over the surface using the slippy substance as friction (which creates little if none).On the otherhand, objects such as tires can skid when the tire itself is taking the friction instead of the rotor. Essentially the tire is attempting to dig into the road to slow/stop versus the breaks because the breaks are fully applied and typically locked unless ABS activates.


Why is it easy to slip on a floor that is wet?

The puddle changes the coefficient of friction of the floor. Therefore it becomes more slippery.There are ways to control or change the COF of a floor surface with specialized floor treatments which will make the area much more safe and prevent slip and falls.


How does friction affect the motion of a vehicle in the context of tire surface road conditions including skidding braking force braking distance thinking distance and stopping distance?

Tyre surface: If the tyre is new, it will have surface with depressions which will offer more friction compared to old tyre whose surface-depressions are worn out and it is more flat, so it offers less friction. Therefore, new tyre will have less stopping distance, as force of friction is more. Thinking distance is affected neither by friction between tyre and road, nor by friction between brake and tyre. If road has a wet surface, it has less friction so the vehicle will skid farther, and vice versa. The braking force, i.e, friction between tyre and brake is unaffected by road condition or tyre surface. Hence the distance the vehicle travels WHILE retarding due to "braking force", is not same as stopping distance, because even when the wheels are stopped rotating due to braking force, the car will skid a little distance- this total distance is the stopping distance.


More force must be applied when pushing something across a rough surface?

When pushing an object across a rough surface, the roughness creates more friction between the object and the surface. This increased friction requires more force to overcome in order to move the object. The additional force helps to counteract the resistance caused by the rough surface and allows the object to move.


Is the reason you get hot because of friction between the air and us?

No, the main reason we feel hot is because our body generates heat through metabolism, and our skin helps release this heat. Friction with the air has a minimal effect on our body temperature.


Two times when friction is useful?

Friction is useful in helping cars stop when brakes are applied, as the friction between the brake pads and the wheels slows down the vehicle. Friction is also beneficial in walking, as friction between the soles of shoes and the ground prevents slipping and provides traction.


What role does friction have in reducing mechanical efficiency?

Friction is the reason that you can never have a 100% efficient machine. It is the reason that most machine have horrible efficiency.