The bearings don't need friction, but everything else does. It there wasn't any friction it'd be impossible to bolt anything together.
Would depend on the bike, but a few hundred.
You can purchase a friction modifier from your local auto parts store. It is used as an additive to the gear oil in a positraction differential.
seat/handlebars
The answer is Seat and Handle Bar
Yes. If you buy a bicycle from wal-mart, it will come with all the required parts, as tires, already mounted.
The brakes and the tire treads.
Tires, grips, pedals and brakes needs to have high friction, while all rotating parts needs to have low friction.
We use ball bearings in bicycle wheels to reduce friction. Ball bearings are small, metal balls that are placed in between the moving parts of the wheel hub to help it spin smoothly and with minimal resistance. This helps improve the overall efficiency and performance of the bicycle.
Oil can reduce friction between moving parts, and protect exposed metals from rust.
the gears and where the axis of the wheels
The brakes! And the tires (no friction = no traction).
In the bearings, where you want as little friction as possible.
Yes, as the bicycle rolls down the hill, there is still some friction present between the wheels and the surface of the hill. This friction helps to slow down the bicycle's descent and eventually bring it to a stop.
Friction is necessary : If there is no friction between any two surfaces in contact, then the present day civilization will be no more- as we cannot even walk properly on the earth. There will be no fabrics and garments, no construction of buildings and no furniture, even no cooking and no vehicles. So friction is necessary. But too much friction causes a heavy loss of energy, wear and tear of machinery. Thus, the efficiency of machines will decrease tremendously. So, it is rightly said that friction is a necessary evil.
Lithium grease helps reduce friction, protects against corrosion, and provides long-lasting lubrication for bicycle components, resulting in smoother operation and extended lifespan of parts.
Bicycle friction can impact the overall performance and efficiency of a bicycle by causing resistance that makes it harder to pedal. This can result in decreased speed, increased energy expenditure, and reduced overall efficiency.Reducing friction through proper maintenance and lubrication can help improve performance and efficiency.
The bearings