What are the factors that affecting friction?

What are the factors that affecting friction?

The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces (ii) roughness of the surface (iii) deformation of bodies.

How do different surfaces affect friction?

Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.

What is friction Class 11?

Friction is that force which opposes the motion of two objects upon each other. Friction generates only when two objects are in contact with each other. When an object tries to move on other objects than an opposing force develops and resist this movement known as Friction.

How does friction differ in a smooth surface from a rough surface?

Friction in a smooth surface doesn’t have or a little friction while rough surface has a lot of it. Friction occurs because no surface is perfectly smooth. Rougher surfaces have more friction between them.

What might happen if there is no friction 5 examples?

1: You will not be able to write. 2: No riding cycle, bike and not even a car or bus. 3: No machines in companies and so no mechanics. 4: You would have not been able to sit, walk, run or dance.

In what way can friction be reduced?

By polishing the surface, as polishing makes the surface smooth and friction can be reduced. Using lubricants such as oil or grease can reduce the friction between the surfaces. When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings.

Can water reduce friction?

Water can either increase or decrease the friction between two surfaces. Water reduces the friction between rubber tires and road pavements. Water can also increase the friction between two sheets of glass.

What is an example of harmful friction?

The most common harmful friction happening is the grazed knee or elbow when you trip and land on a hard rough surface. Another is rope burn which can be very scarring. If you’re sliding down a rope to save your life, there’s no way you can save your hand. Ouch!

What is the least friction?

Rolling friction

What 4 things can Friction do?

Friction is the force that opposes motion between any surfaces that are in contact. There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Fluid friction occurs in fluids, which are liquids or gases.

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.

Is friction good or bad?

Friction can slow things down and stop stationary things from moving. In a frictionless world, more objects would be sliding about, clothes and shoes would be difficult to keep on and it would be very difficult for people or cars to get moving or change direction.

What is friction explain with an example?

Friction acts as a resisting force which is generated , when two solid surfaces slide against one another. Examples :- <> For walking , there is a friction between our shoes / feet . <>There is a friction between the tires of a vehicle and between the road.

What are the two effects of friction explain with examples?

Effects of Friction It produces heat, that helps in heating parts of any object or to warm ourselves. It also causes loss in power. It produces noise during any kind of operation. It’s because of friction that we’re able to walk, run, play, etc.

What is friction give two examples?

Friction is a force that opposes motion between any surfaces that are touching. Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engine can cause the parts to wear out.

What is static friction example?

Some real-life examples of static friction are given in the points below. Papers on a tabletop. A towel hanging on a rack. A bookmark in a book. A car parked on a hill.

What are some examples of useful friction?

Helpful frictional forces

  • friction between our shoes and the floor stop us from slipping.
  • friction between tyres and the road stop cars from skidding.
  • friction between the brakes and wheel help bikes and cars to slow down.

How friction helps us in our daily life?

Without friction between the shoes and the ground, you cannot walk properly. If there is no friction, all of us would be sliding around without any control over ourselves. While walking, you’re pushing your foot back as you try to step forward. Friction holds your shoe to the ground so you can walk around.

What is friction in real life?

Friction is what holds your shoe to the ground. The friction present on the ice is very little, this is the reason why it is hard to walk on the slippery surface of the ice. Writing – A frictional force is created when the tip of the pen comes in contact with the surface of the paper. Water lowers friction.

What would happen if there was no friction?

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. With no friction the only possible movement would be falling to a lower point under gravity.

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.

What if there was no friction for one minute?

A world without friction would be unlivable. The reason why friction is so important to our world, is because it affects everything that’s in motion. When any object is moving, slipping or sliding in one direction, friction is acting in the opposite direction. So, for example, consider something as simple as walking.

Can we stand without friction?

One must push off the chair in order to stand. As soon as one pushes off a chair, one’s feet push of the floor and since the floor has no friction, a rotational motion of feet and legs would occur and standing up is not possible.

What is not possible without friction?

Answer: Cycling and Riding cars and riding bikes is impossible without friction..

Can a wheel roll without friction?

To your second part of the question : No. A kinetic friction will also cause rolling. The kinetic friction when applied to a wheel will decrease its linear velocity but increase its angular velocity( friction is parallel to surface and hence provides a non-zero torque ).

Is friction force zero in pure rolling?

Work done by friction in pure rolling is always zero.

How does friction act on a wheel?

The friction force acts in the forward direction on the rear wheel and it acts in the backward direction on the front wheel. The magnitude of friction force on the rear wheel can be more, equal or less than that on the front wheel. If pedaling is stopped, the direction of friction force on the rear wheel gets reversed.

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