Question 3: Can we reduce friction to zero? Answer: Friction can be reduced to a great extent by polishing surfaces or by using a large amount of lubricants such as oil, water, or grease but we cannot reduce friction to zero.
Can you reduce the friction?
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.
Is there ever zero friction?
No, exactly zero friction isn’t possible practically. But we can get very close to it by using having very flat and even surfaces, ball bearings, lubricants etc. Having zero friction means that there is no interaction between the two surfaces in contact, but there is no way we can avoid such interaction completely.
Can we reduce friction to zero by polishing surfaces or by using large amount of lubricants give reason?
we cannot reduce friction to zero by using lubricants or by polishing. friction exits and it cannot be completely eliminated. friction exits at even atomic levels too.
Can we move without friction?
A: Motion is indeed possible without friction! Even if an object is stationary in one reference frame, in another reference frame moving with respect the first, that same object will be seen to be moving. So motion really doesn’t need friction at all!
Can we reduce friction 0 explain?
No, we cannot have zero friction surfaces. Even if we have used a lot of lubricants. We can reduce the friction but we can never reduce it to zero because every surface will still have minor in them. A frictionless surface is not possible is not possible because the surface cannot have a zero friction surface.
Can human live without friction?
While we cannot eliminate friction, we can limit its power significantly.
Can friction be less or become nil by using lubricant?
Yes, friction become less by using lubricants but it will not zero or nil.
Why do we reduce friction?
Why do we need to decrease friction? Friction is a necessary evil which causes a lot of wear and tear in machine parts that move against each other. It erodes the surfaces and destroys their symmetries. Hence, in such cases it is desirable to reduce friction.
What is an example of reducing friction?
A good example of this is a ball or wheel. They roll to help reduce friction. Another way to reduce friction is with a lubricant like grease or oil. Machines and engines use grease and oil to reduce friction and wear so they can last longer.
What are different methods of reducing friction?
To reduce friction we can make the surfaces in contact smooth. Also adding a lubricant to two surfaces in contact reduces friction between them. Grease is added between the moving parts in machines, to reduce friction. Another method of reducing friction is by using bearings.
Can we reduce friction 20 by polishing surface?
Answer: Friction can be reduced to a great extent by polishing surfaces or by using a large amount of lubricants such as oil, water, or grease but we cannot reduce friction to zero.
How do you reduce friction on the floor?
- The use of bearing surfaces that are themselves sacrificial, such as low shear materials, of which lead/copper journal bearings are an example.
- Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.
Can we reduce friction to zero Why Class 8?
No we cannot reduce friction to zero because friction exists at even atomic levels too.
Why is sliding friction less than static?
Ans. The two sliding objects find less time to get interlocked against each other (objects and irregularities of surface). So they get less friction. Therefore sliding friction is always less than static friction.
Can polishing reduce friction?
Polished machine surfaces can improve equipment performance by reducing friction and increasing efficiency.
Is friction is a necessary evil?
Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. … But almost all crucial tasks cannot be carried out without the presence of friction. Basic activities like walking and writing on a surface are possible due to friction. Hence it is considered as a necessary evil.
What happens if friction disappeared?
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.
How is friction reduced in the real world?
When two surfaces slide over one another the tiny bumps push on each other. Friction causes a force on a surface which is in the opposite direction to its motion. Friction can be reduced by the application of lubricants.
When there is no friction there is no loss of?
Statement 1 : When static friction acts, there is no loss of mechanical energy.
Does ice have friction?
The overwhelming consensus is that ice has low friction because of a thin film of liquid water coating its surface. Hence skaters balanced on thin metal blades can glide smoothly across the ice rink, but grind to a halt on the wooden floor beyond.
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. That’s why drivers have to be extra careful not to skid when roads are wet. Water can increase the friction between your fingers and a sheet of plastic.
How do lubricants reduce friction?
The lubricants spread over the irregularities on the surface that makes the contact. So, the contact between the lubricant and the moving objects reduces the friction.
Why does powder reduce friction?
By sprinkling powder, what happens is the powder dust will fill the small unseen gaps and make the board smoother. This will help the surface of the coins and the striker to overcome the friction. Thus it will reduce friction.
Where is it useful to reduce friction?
Sometimes we want to reduce friction. For example, we use oil to reduce the friction between the moving parts inside a car engine. The oil holds the surfaces apart and can flow between them. The reduced friction means there is less wear on the car’s moving parts and less heat produced.
Can Sand reduce friction?
Adding a small amount of water to sand can significantly reduce the sliding friction. Everyone who has been to the beach will know that dry sand doesn’t make good sandcastles—the grains slump into a puddle when the bucket is lifted.
Can friction be reduced to zero by making the surfaces highly polished and extremely smooth?
Yes, Theoretically it is possible by making surface smooth. exp:- Ice surface, Highly polished surface.
Is static friction?
Static friction is a force that keeps an object at rest. Static friction definition can be written as: The friction experienced when individuals try to move a stationary object on a surface, without actually triggering any relative motion between the body and the surface which it is on.
Is friction a fluid?
Fluid friction is the resistance to an object’s motion through a liquid or gas. When the motion is occurring in a liquid, it is referred to as viscous resistance. As an example, when an object falls through water, its speed reduces due to fluid friction acting on it.
Does oil reduce friction?
The oil reduces the amount of friction, which improves the performance of the engine and also reduces its fuel consumption. But that’s not all. Your lubricant protects your engine against corrosion and acid attacks. It also helps to reduce the temperature of your engine.
Can the force of friction be made zero give examples?
Friction always acts to oppose any relative motion between surfaces. For the simple example of a book resting on a flat table, the frictional force is zero. There is no force trying to move the book across the table, so there is no need for a frictional force because there is nothing for the frictional force to oppose.
Is sliding friction less than rolling friction?
As the area of contact is less in the case of rolling than in the case of sliding, rolling friction is less than the sliding friction. Rolling friction is the resistance to motion experienced by a body when it rolls upon another. It is much less than sliding friction for the same pair of bodies.
How can you reduce the friction of a slide?
You can reduce the resistive force of sliding friction by applying lubrication between the two surfaces in contact, by using rollers, or by decreasing the normal force.
What surfaces have less friction?
Smooth surfaces have less friction; Rough surfaces produce more friction; Friction causes heat; We can decrease (reduce) friction by using liquids to make surfaces smoother.
How do wheels reduce friction?
A wheel reduces friction by allowing the contacting surfaces to roll rather than to drag or slide over each other. By reducing friction, a wheel can enable you to use less force to move an object.
What is limiting friction?
Limiting friction occurs when the moving force and the force opposing motion are equal; any addition to the moving force will cause slipping. The limiting frictional force is proportional to the normal reaction between the contacting surfaces and is independent of the area of contact.
How we can increase friction?
Friction can be increased by: making the surfaces rough. pressing the surfaces harder against each other (by increasing normal force).
Why is friction a disadvantage?
Friction produces unnecessary heat leading to the wastage of energy. The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects. Forest fires are caused due to the friction between tree branches.
Why friction is a foe?
Friction is foe:
(i) Friction causes wear and tear in objects. (ii) It causes damage to the parts of machines. (iii) The machines or tools regular maintenance due to which a lot of money is wasted. (iv) It reduces the speed of moving objects, so more force is required.
How is friction harmful?
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.
Does space have friction?
While outer space does contain gas, dust, light, fields, and microscopic particles, they are in too low of a concentration to have much effect on spaceships. As a result, there is essentially zero friction in space to slow down moving objects.
What happen if there is no gravity and friction?
Humans and other objects will become weightless without gravity. If we have no gravity force, the atmosphere would disappear into space, the moon would collide with the earth, the earth would stop rotating, we would all feel weightless, the earth would collide with the sun, and as a consequence.
Does glass have friction?
Moisture in air causes an increase in adhesion and surface strengthening of glass. These changes result in an increase in friction. Glass is the only material known to exhibit lower friction in vacuum than in air.
Is friction useful in playgrounds?
Friction. While gravity is an essential element of physics to a playground slide, friction is of equal importance. Friction works against gravity to slow a person’s descent on a slide.
Do pencils need friction to write?
The writing process actually works through sliding friction, so moving the pencil lead is the essential process. What does this mean? When drawing with a pencil or any other writing device, there needs to be sliding friction between the molecules at the pencil tip and the paper surface for anything to happen.
What is the weakest type of friction?
Rolling friction is the weakest kind of friction. It is the force that resists the motion of an object rolling across a surface.