Wednesday, September 12, 2018
The resistance that one surface or object encounters when moving over another.a lubrication system which reduces friction’ It's originated from mid 16th century (denoting chafing or rubbing of the body or limbs, formerly much used in medical treatment): via French from Latin frictio(n-), from fricare ‘to rub’. Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
Scientists began piecing together the laws governing friction in the 1400s, but because the interactions are so complex, characterizing the force of friction in different situations typically requires experiments and can't be derived from equations or laws alone.
For every general rule about friction, there are just as many exceptions. For instance, while two rough surfaces (such as sandpaper) rubbing against each other sometimes have more friction, very smoothly polished materials (such as plates of glass) that have been carefully cleaned of all surface particles may actually stick to each other very strongly.
The frictional force is that force responsible for wear and tear of two bodies. When two bodies in contact, move relative to each other then there exists a force which has a tendency to oppose that movement which is called frictional force. There are in general 2 different types of friction. Lets see about them.
1.STATIC FORCE
A static force refers to a constant force applied to a stationary object. A static force is too weak to move an object because it is being countered by equally strong opposite forces.
The most common example of a static force is static friction on a stationary object. If an object has some force being applied to it while it is on a surface, the force of friction will increase proportionally to the force until a certain limit. If the applied force is large enough, it can overcome the static friction and move the object. The force is then a kinetic force that is being resisted by kinetic friction
2. KINETIC FORCE
An object that has motion - whether it is vertical or horizontal motion - has kinetic energy. There are many forms of kinetic energy - vibrational (the energy due to vibrational motion), rotational (the energy due to rotational motion), and translational (the energy due to motion from one location to another). To keep matters simple, we will focus upon translational kinetic energy. The amount of translational kinetic energy (from here on, the phrase kinetic energy will refer to translational kinetic energy) that an object has depends upon two variables: the mass (m) of the object and the speed (v) of the object. The following equation is used to represent the kinetic energy (KE) of an object
What is friction?
The resistance that one surface or object encounters when moving over another.a lubrication system which reduces friction’ It's or...
