When Is Friction Not Useful

Hint: Frictional force causes a lot of losses in general upkeep and wear and the tearing 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 is an example when friction is unhelpful?

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.

What is the disadvantages of friction?

Three disadvantages of friction are : Friction produces heat which damages the moving parts of a machine. Friction produces wear and tear on the contacting surfaces. This reduces the life of machine parts, tyres and shoe soles. A lot of energy is wasted in overcoming the friction before an object starts moving.

When would you need less friction?

Other times we want surfaces to have low friction, such as when you go down a slide at the playground or sled on a snowy hill. The amount of friction changes depending on which materials come into contact with one another. Another thing that can affect friction on an object is the object's weight.

How can you say that friction is a necessary evil?

Friction is said to be a necessary evil because it is useful as well as harmful. Friction helps us to walk, write, hold things, lift objects. So it is necessary for our lives. Without friction, many essential processes can not be done.

How can unhelpful friction be reduced?

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.

How is friction a problem?

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. Friction can also cause parts in contact to heat up and can cause parts in contact to wear out.

What are the two advantage and disadvantage of friction?

It helps to support ladder against wall. Disadvantages of friction: 1.It always resists the motion, so extra energy is required to overcome it. 2.It causes wear and tear of machines. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

How friction is useful and harmful?

Without friction, a car's tires could not push against the ground to move the car forward, and the brakes could not stop the car. Without friction, a car is useless. However, friction can also cause problems in a car. Friction between moving engine parts increases their temperature and causes the parts to wear down.

Why would u want to decrease 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.

Why would people want to reduce friction?

Friction will occur at any place where two surfaces come into contact with each other. Friction can cause energy losses that create unwanted heat, deformation, and wear. This can reduce the lifetime and increase the cost of the products you design.

What are examples of less friction?

For example, ice contacting with steel would produce less friction than rubber would on concrete. This is why ice skates slide so easily on the ice, but you don't slip when wearing rubber shoes on the sidewalk.

Is friction is necessary for walking?

We are able to walk on ground because friction between the sole of our shoes and ground prevents us from slipping over the ground.To take a step forward during walking ,we lift one foot Off the ground and push the ground backwards with the other foot.

Why is friction called a perverse force?

Friction always opposes the between the surfaces in contact with each other. Hence, it is called as a perverse force.

Can we eliminate friction completely?

Friction cannot be eliminated except in a perfect vacuum. A perfect vacuum does not exist even in intergalactic space, and cannot be created on artificially on Earth So friction cannot be totally eliminated. Even a few particles in an almost perfect vacuum will cause some friction.

Which shows that friction is undesirable?

Walking on wet floor is an example which shows that friction is undesirable. Friction is defined as the force which resists the sliding or rolling of a solid or fluid object over another. There are 4 types- static friction, sliding friction, rolling friction and fluid friction.

Which of the following is friction undesirable?

Friction is Undesirable: A friction is undesirable during ice skating or when a block is lifted or put down on the truck with the help of some inclined plane.

How is friction a foe?

Friction is a foe: (i) Friction causes wear and tear in objects. (ii) It causes damage to the parts of machines. (iii) The machines or tools require regular maintenance due to which a lot of money is wasted. (iv) It reduces the speed of moving objects, so more force is required.

What is wasteful friction?

Answer: In any type of vehicle—such as a car, boat or airplane—excess friction means that extra fuel must be used to power the vehicle. In other words, fuel or energy is being wasted because of the friction. Fluid friction or air resistance can greatly reduce the gas mileage in an automobile.

Which of the following is not an effect of friction?

HERE IS YOUR ANSWER MATE Things have weight is NOT an effect of Friction