# Do you need friction to ride a bike?

## Do you need friction to ride a bike?

There is friction between the handlebar and the hands that allows for a successful gripping. The bike tire and the road have some friction so that we can actually roll the bike wheels safely without sliding. There are two major physical mechanisms that control friction.

What if there was no friction?

Explanation: Friction stops things from sliding apart. If there was no friction everything would slide to the lowest point. It would be impossible to climb up anything.

What role does friction play in cycling?

The friction force acts in the forward direction on the rear wheel and it acts in the backward direction on the front wheel. The friction force on the rear wheel is more than that on the front wheel if the bicycle accelerates. These two are equal if the bicycle moves with a constant speed.

### What if there was no friction for one minute?

Anything you were holding on to, at the moment friction ceased to exist, would instantly fall to the ground or fly out of your hand. If you were walking when friction disappeared, your legs would still work, but you wouldn’t go anywhere.

Where is friction not useful on a bike?

Friction can also be unhelpful. If you do not lubricate your bike regularly with oil, the friction in the chain and axles increases. Your bike will be noisy and difficult to pedal. When there is a lot of friction between moving parts, energy is transferred to the surroundings, causing heating.

Does friction slow you down?

Friction is a force that opposes the motion of objects; friction can cause objects to slow down. Air resistance causes moving objects to slow down.

#### What life would be like without friction?

It opposes motion, meaning if something is sliding on the floor, friction is the force that makes it eventually come to a stop. In a world without friction, the object would continue to slide forever, if not acted on by another force.

Can we move without friction?

Motion is indeed possible without friction! These also don’t require friction. Newton’s first law states that objects with no external forces on them will continue to move in the same direction at the same speed. Objects at rest with no forces on them remain at rest.

How does friction help the bike to slow down or stop?

Friction causes resistance in motion. It is also a force that acts in opposite direction of motion. When you put a brake on your bicycle, it stops suddenly because you increase the friction between the wheels and road.

## Where should there be high friction on a bike?

Ask students to find places on the bike where friction is increased or decreased to make the bike function. Friction is high (brakes, pedal surfaces) where the rubbing surfaces are rough. Friction is reduced (wheels, handle bars) with ball bearings and grease (rolling and lubricants).

Where is friction not useful?

Friction is sometimes unhelpful. For example, if you don’t lubricate your bike regularly with oil, the friction in the chain and axles increases. Your bike will be noisy and difficult to pedal. When there is a lot of friction between moving parts, energy is lost to the surroundings as heat.

How is friction harmful examples?

Friction reduces the speed of the moving objects and it even stops the motion of the object. Friction between the objects produces heat. This results in the wastage of energy in the machines. There will be wear and tear of the machine parts due to friction.