The Friction between two Surfaces depends on two Factors
- (1) The nature of the two surfaces i.e. smoothness or roughness of two surfaces
- (2) The force with which two surfaces are pressed together.
What causes Friction?
Among various other causes, the main cause of this resistive force or frictional force is molecular adhesion, surface roughness which depends on the nature of surface and body in contact, and deformations in the surface or in the moving object.
How does friction affect the motion of an object?
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 is the force that opposes motion?
Friction is a force that resists or opposes the relative motion between two objects or materials. Various reasons are responsible for this opposing force to come into action. Among various other causes, the main cause of this resistive force or frictional force is molecular adhesion, surface roughness which depends on the nature of surface and body in contact, and deformations in the surface or in the moving object.
What happens when two rough surfaces come in contact?
And hence two rough surfaces, when come in contact with each other, generate frictional force or an opposing force which sometimes may convert into heat between them. The degree of friction increases when the roughness increases as it is harder to walk on a road with many pebbles and easier to walk on a leveled road.
Why is friction required for movement?
If we reduce friction to zero, movements will not take place as then the object will not move it will just slip over the surface of the other and hence it is required to have some minimum friction for any kind of motion to take place between two objects or surfaces. Like for example, we cannot walk in ice because its surface is smoother and so it has the least friction and hence we slip whenever we try to walk there. Hence, for ice skating or any other activity on the surface of ice we need to use specially designed ice skating shoes or boots which have ends with rough surfaces to ensure we have some required friction for our movement.
How to determine the coefficient of friction?
Relative motion between the object and the balance. One of the ways to determine the coefficient of friction between two surfaces is to pull on an object, using a spring scale that is used to measure the weight of the object. If we lay an object on another surface and ...
What is friction in 2021?
Last Updated : 21 Feb, 2021. Friction is an opposing force that restricts the motion of one body over the surface of another body in contact with it. It is absolutely necessary for the motion of any object over another. It is like a necessary evil which harms and helps.
