Friction is an opposing pressure that restricts the movement of one body end the surface of another body in contact with it. That is absolutely vital for the activity of any type of object end another. The is prefer a vital evil i m sorry harms and helps. Its double function can be understood by the instance of walking, we are able to walk due to the fact that there is friction, and also we space walking in ~ a particular low speed because of the the opposite force provided by friction.Also, like in case of a ball easily rolling or sliding on the ground, the ball eventually concerns stop, since of the force of friction the acts between the ball and also the ground during its movement. This way that if a force acts in the direction from ideal to left, friction plot in left to right direction and the vice versa is additionally true that if the force acts in left to right the friction will act in the opposite direction that is from appropriate to left.

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There room some pressures which just comes into action when they are in call with every other. That is well-known as the contact forces. That is offered by solids, liquids and additionally by gases, however it is preferably in the case of solids and also least in the instance of gases. The impacts of friction include the progressive wearing away of things; this deserve to be watched in examples like the uneven soles of our shoes, balding bicycle tyres and the deliberate activity of rubbing sandpaper top top a surface.


Friction have the right to only be decreased it cannot be eliminated. We have the right to reduce friction v the help of lubricants on the surface ar in contact. To reduce friction help in far better movement that objects over each other. If a surface is an extremely rough we need to make the smoother for activity using some reliable lubricants such as oil or grease choose incase of machinery parts we usage greasing technique to protect against friction between the parts when functioning.If we mitigate friction come zero, activities will not take ar as climate the object will not relocate it will simply slip over the surface ar of the other and hence the is compelled to have some minimum friction for any kind of kind of motion to take place between two objects or surfaces. Like for example, we cannot walk in ice since its surface is smoother and also so it has the least friction and hence we slip anytime we shot to go there. Hence, for ice skating or any type of other activity on the surface of ice cream we should use specially designed ice skating pair of shoes or boots which have actually ends through rough surface to for sure we have actually some forced friction because that our movement.

What reasons Friction?

Friction is a force that resists or opposes the loved one motion between two objects or materials. Various reasons room responsible because that this opposing force to come into action. Amongst various various other causes, the main reason of this resistive pressure or frictional force is molecular adhesion, surface ar roughness which relies on the nature that surface and body in contact, and deformations in the surface or in the relocating object.Adhesion is the molecular pressure resulting once two products are brought into close contact with every other. Favor there is a force of adhesion between the surface of glass and water the is why as soon as poured right into a glass that wets the surface of the glass.Every object has actually a rough surface irrespective of the looking smoother in ours naked eyes. However when we observe through a microscope, we discover that the surfaces of every the objects have actually rough edges. And also hence two rough surfaces, as soon as come in contact with every other, create frictional force or one opposing pressure which sometimes may convert into heat in between them. The degree of friction rises when the roughness rises as the is harder to walk ~ above a road with many pebbles and also easier come walk on a leveled road.Deformations in the body or the surface ar of the human body in contact may create friction throughout its motion. The more is the deformations in the surface the more is the frictional or the opposing force to stop its motion and hence we need to use part lubricants in some cases to eliminate those frictional or opposing forces.Spring balances administer a method of massive measurement the is both simple and convenient and also cheap. The massive is hung on the end of a spring, and the deflection that the spring due to the downwards gravitational force on the mass is measured against a scale. We deserve to use this for performing and experimentally determining the different frictional forces in the situation of different objects.The observations are used to identify the following:The force acting on things hung at the end of the balanceThe pressure of friction exerted by the bodyMagnitude that the push by the bodyRelative motion in between the object and the balanceOne of the means to recognize the coefficient the friction between two surface is to pull on one object, making use of a spring scale that is provided to measure up the load of the object. If us lay an object on an additional surface and then pull it, we deserve to determine the amount of pressure required to move the object into any kind of surface.

Factors affect Friction

Roughness/smoothness the the slide object

The friction generated depends ~ above the roughness and also smoothness that the sliding object. The rougher is the thing the more friction will certainly be generated and also hence its movement will end up being restricted. The smoother is the object the more smoothly it can move.


Smooth Ball
Rough Ball


Answer:Friction, pressure that resists the slide or roll of one solid object over another. Friction forces, such as the traction necessary to walk without slipping, may be beneficial, yet they likewise present a an excellent measure the opposition come motion.Question 2: What space the two advantages and defect of friction?Answer:Friction produces unnecessary warm leading come the wastage that energy. The pressure of friction plot in opposing direction that motion, for this reason friction slows down the activity of moving objects. Woodland fires space caused because of the friction between tree branches.Question 3: What space the causes of friction?Answer:Friction is a resistive force, i beg your pardon comes right into play as soon as there is a family member motion between two bodies in contact. The friction force in between two bodies depends mainly on three factors: (I) the adhesion in between body surface (ii) roughness the the surface ar (iii) deformation of bodies.Question 4: What is systematized shape explain with example?Answer:A special shape of the body that reduces fluid friction is referred to as the systematized shape. Example: Aquatic pets like fish, crocodiles, and also sharks and the vehicles favor cars, flights, ships act. Streamlined shapes aid reduce the lot of air traction when an object is moving.Question 5: does friction depend on the surface area?Answer:Friction is a call force once two surface interact. Hence, so friction relies on the surface ar of call as the surface of contact increases the frictional force also increases.Question 6: discover the force of friction if the coefficient of friction is 0.25 and the regular reaction readily available by the surface ar is 5N.Solution:As we understand that, F = µNGiven, µ= 0.25N = 5NF = µN


Therefore, F = 0.25 × 5NTherefore, F = 1.25NHence, the frictional force exerted is 1.25 N.Question 7: What is the coefficient the friction if the frictional pressure exerted is 125N and the normal reaction force offered is 200N.Solution:As we understand thatF = µNGiven, F = 125NN= 200N	herefore mu =fracFN	herefore mu =frac125N200Nµ = 0.625Hence, the coefficient the friction is 0.625.Question 8: What is the typical reaction offered by the surface if the frictional force generated to be 60N and also the coefficient the friction to it is in 0.6.

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Solution:As we know thatF = µNGiven, F = 60Nµ= 0.6	herefore N=fracFmu	herefore N=frac60N0.6	herefore N=100NHence, the typical reaction produced by the surface is 100N.