In the bearings and in the tires. All it does there is turn into heat - and we can't use that for going forward.
There is friction between the rubber tires and the road or other riding surface.There resistance to the rider moving through the air.The bicycle's chain, pedals, gears, etc all develop frictional forces.
A bicycle helmet is a piece of protective headgear intended to be worn while riding a bicycle.
No
Yes
no car cood crash
Tires, grips, pedals and brakes needs to have high friction, while all rotating parts needs to have low friction.
applied, normal, and friction
If they're riding the bicycle, particulary in traffic - yes. Taking the hands off the bars while riding is as bad as taking the hands off the steering wheel while driving a car.
Friction can be harmful or helpful when driving, no matter what time of year. For instance it is helpful when breaking and it is harmful between bearing surfaces. The loss of friction between the tyres and the road during winter can be disastrous.
if you mean for riding a bicycle, you can't really, you have to ride with the shoelaces out of your shoes while riding or get biking shoes
Apparently not. I just received a ticket myself
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.