- Why do we reduce friction?
- What are the disadvantages of friction?
- What are 5 ways to reduce friction?
- Does sandpaper reduce friction?
- What are the five disadvantages of friction?
- How can we reduce fluid friction?
- How can we reduce or increase friction?
- What is the basic principle of increasing friction?
- What are the causes of friction?
- What are some examples of useful friction?
- What is an example of bad friction?
- What are the pros and cons of friction?
- What are the methods used to reduce friction?
Why do we reduce 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.
Friction is reduced by lubricating surfaces to decrease the friction..
What are the 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.
What are 5 ways to reduce 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.
Does sandpaper reduce friction?
As the sandpaper got to a certain roughness the grains of sand where larger which decreased the over all contact area and reduced the friction. The grains are larger so there will be fewer contact points.
What are the five disadvantages of friction?
Disadvantages of friction:Friction produces a lot of heat in various parts of the machinery and this leads to wastage of energy as heat.Opposes motion, hence more energy is needed to overcome friction.Noise production in machines is irritating as well as leads to energy loss.Forest fires are caused due to friction between branches of trees.More items…
How can we reduce fluid friction?
The fluid friction or drag can be reduced are minimised by giving special shape called streamlined shape to the objects which Move through fluids like air or water .
How can we 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 is the basic principle of increasing friction?
The basic principle for increasing friction is by increasing the roughness of the surfaces in contact.
What are the causes of friction?
Friction is a force that resists the relative motion between two objects or materials. The causes of this resistive force are molecular adhesion, surface roughness, and deformations. Adhesion is the molecular force resulting when two materials are brought into close contact with each other.
What are some examples of useful friction?
Helpful frictional forcesfriction 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.
What is an example of bad friction?
Motor oil, wax, and grease are examples. Friction can also be reduced by rolling, rather than pushing, an object.
What are the pros and cons of friction?
Disadvantages of friction:It always resists the motion, so extra energy is required to overcome it.It causes wear and tear of machines.It decreases the life expectancy of moving parts of vehicles.Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil.
What are the methods used to reduce 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.