- Is friction useful or harmful?
- What are 3 ways friction can be reduced?
- How can friction be unhelpful?
- Why do we need to decrease friction and how it can be decreased?
- How can you reduce or increase friction?
- What causes friction to increase?
- Does Sand increase friction?
- What are some examples of harmful friction?
- Why does water decrease friction?
- How does Banking reduce friction?
- How can you prevent friction?
- How can we reduce friction give example?
- What happens if we don’t reduce friction in machines?
- Why is friction good and bad?
- Why do we sometimes need to reduce friction?
- What are 2 ways to increase friction?
- What are the disadvantages of friction?
Is friction useful or harmful?
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.
Friction can be both harmful and helpful, so it may be necessary to decrease or increase friction..
What are 3 ways friction can be reduced?
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.
How can friction be unhelpful?
Friction can also be unhelpful. If you do not lubricate your bike regularly with oil, the friction in the chain and axles increases. … When there is a lot of friction between moving parts, energy is transferred to the surroundings, causing heating. Think of what happens when you rub your hands together quickly.
Why do we need to decrease friction and how it can be decreased?
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. Friction is reduced by lubricating surfaces to decrease the friction.
How can you reduce or increase friction?
when a ground or surface become slippery after rain or water splashing it is made rough by spreading sand to increase the friction. To decrease friction: (i) Friction between two surfaces can be decreased by using lubricants. (ii) Friction between two surfaces can be reduced by polishing them.
What causes friction to increase?
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.
Does Sand increase friction?
As the concentration of the sand particles in the lubricated sliding contact increases, the friction and wear rates increased.
What are some examples of harmful friction?
HARMFUL FRICTIONSlipping on ice.Wet roads.Mudslides.
Why does water decrease friction?
Water, under certain circumstances may come between the 2 surface and act as a barrier to reduce the amount of contact area between these 2 surfaces – and hence reduce the friction between them.
How does Banking reduce friction?
In simple terms, the system of raising the outer edge of a curved road above the inner edge is called banking of roads. The banking of roads is a good way to lessen the wear and tear caused due to friction as the horizontal component of normal reaction gives the necessary centripetal force, hence lessens friction.
How can you prevent friction?
There are several ways to reduce friction: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.More items…
How can we reduce friction give example?
Methods of reducing friction1)Friction can be reduced by making the surface smooth by polishing.2)Friction can be reduced by applying lubricants (like oil or grease) to the rubbing surface.3)Friction can be reduced by using wheels to move objects.4)Friction can be reduced by using ball bearing between the moving parts of machine.
What happens if we don’t reduce friction in machines?
1️⃣If we did not reduce friction in machines, it will requires more power to complete a work and results in wastage of energy. 2️⃣Also the heat generated by friction can disrupts and destroys the part of the machinery.
Why is friction good and bad?
Answer: Friction is the force which opposes the motion. Friction is the reason why we can walk or the vehicles could move or to write something on the board, hence it is advantageous. On the other hand, as a portion of energy gets wasted to overcome friction, it has some bad effects too.
Why do we sometimes need to reduce friction?
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.
What are 2 ways to increase friction?
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.
What are the disadvantages of friction?
Disadvantages of Friction: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.More items…