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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.
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What principle of fource is used on bicycle's brake?
Friction and leverage.
Which force causes a bicycle to slow down when the brake are used?
That is called friction.
What part of a bicycle is a useful friction?
The brakes! And the tires (no friction = no traction).
Where on a bicycle is friction not important?
In the bearings, where you want as little friction as possible.
What Suppose a bicycle was coasting on a level surface and there was no friction. What would happen to the bicycle's speed?
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What part of a bicycle has a small amount of friction?
The bearings
How a bicycle is slowed down by dragging your feet along the ground?
Poorly, very poorly. Friction is what slows the bike down.
How does friction help the breaks in a bicycle work?
Because friction stops momentum of force from moving the bike
Parts of a bicycle where friction can be maximised?
The brakes and the tire treads.
What is the force that makes you bicycle brakes work?
Friction and pressure.
What is the coefficient of friction for bicycle tires?
twice as much as half of it!
Does brakes on a bicycle have a lot of friction or not much and is it useful or not useful?
Brakes are meant to have a lot of friction and it's useful.
