sandy floor. because sand is of coarse in texture. the rougher the texture the more friction. a wet floor has less friction because water sticks to the surface and somewhat coats the area leaving it with less friction.

Methods for decreasing friction:

• Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction.
• Lubrication is another way to make a surface smoother.
• Make the object more streamlined.
• Reduce the forces acting on the surfaces.
• Reduce the contact between the surfaces.

There are four types of friction: static, sliding, rolling, and fluid friction. Static, sliding, and rolling friction occur between solid surfaces. Static friction is strongest, followed by sliding friction, and then rolling friction, which is weakest.

Everyday Examples of Sliding Friction

• Rubbing both hands together to create heat.
• A sled sliding across snow or ice.
• Skis sliding against snow.
• A person sliding down a slide is an example of sliding friction.
• A coaster sliding against a table.
• A washing machine pushed along a floor.
• An iron being pushed across material.

A smooth surface has smaller hills and valleys. There are also electrostatic attractions between surfaces, but these are weaker than the physical barriers to sliding. Liquids such as water and oil reduce friction because they keep the two surfaces from contacting each other.

SMOOTH SURFACE

Answer. Because ice has the maximum capacity to reduce the friction as compared to ground of cricket, football and hockey.

There are two methods of increasing friction: one is by making the surfaces rough and the other by increasing the mass of the object that is moving. For example, the tyres of vehicles have treads (these are the ‘designs’ that you can see on the tyre surface), which increase the friction between the tyre and the road.

A pair of rough surfaces will have more friction than a pair of smooth surfaces, because the “peaks” of one surface can fall into the “valleys” of the other, meaning that to keep moving either something needs to break, or the surfaces would need to push apart briefly.

Rougher surfaces have more friction between them than smoother surfaces. That’s why we put sand on icy sidewalks and roads. You can’t slide as far across ice with shoes as you can on the blades of skates (see Figure below). The rougher surface of the soles of the shoes causes more friction and slows you down.

So, as long as the surfaces are relatively uniform, meaning they do not change in microscopic texture from one region to another, the amount of area in contact does not affect the frictional force.

Friction, in simplest terms, is a force that opposes motion. It occurs when two surfaces are in contact with each other. Friction occurs due to the roughness of the surfaces in contact. Even if a surface appears really smooth to our eyes, it is not so at micro scale or nano scale.

Friction is a contact force when two surfaces interact. The second equation is the kinetic frictional force that is used when two surfaces are sliding against each other.

Grade 8. Friction occurs because no surface is perfectly smooth. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.

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.

HARMFUL FRICTION

• Slipping on ice.
• Wet roads.
• Mudslides.

Since friction is a resistive force that slows down or prevents motion, it can be a nuisance, because it can hinder motion and cause the need for expending extra energy.

Answer. Though friction is said to be a waste of energy in most of the times, it is really useful at many times in regular life. We need to increase the frictional force while pressing the brakes of a car or a bicycle to stop it at the right time.

7 methods of reducing friction

• Methods of reducing friction. Make surfaces smooth by grinding.
• Make the sliding surfaces smoother.
• Application of lubricants.
• Streamlined design of the sliding body.
• Reduce contact between surfaces.
• Convert to rolling friction.
• Reduce pressure or weight on the object.
• Use fluid friction instead of the dry friction.

Friction’s advantages include:

• Being able to walk across a surface without slipping. This is static friction.
• Writing on a piece of paper with a pencil or a pen. This is. sliding friction. * Driving a car across the road surface. This is. rolling friction. * Jumping out of an airplane with a parachute. This is.

Friction can be a useful force because it prevents our shoes slipping on the pavement when we walk and stops car tyres skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding. Sometimes we want to reduce friction.

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.