hello every good girl please explain friction lesson of physics 8 that standard please
Answers
Explanation:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.
Formula
Friction force
f = \mu N
f = friction force
\mu = coefficient of friction
N = normal force
sorry mate I cant cover the whole chapter here.... but I'll make sure to explain the important topic....
friction :
force between two bodies when they are in relative motion (tendency of motion)
advantages of friction:
●friction allow us to control movements
● it reduces slipping and sliding
●it allow us to grip objects
disadvantages of friction:
●friction causes wear and tear
●it makes things overheat
● it make objects move slowly
reduces with the help of lubricants:
lubricant is a substance that reduces friction between two moving surfaces
streamlining:
giving a shape to body such that they least resistance to air or water. for example, shape of an aeroplane , a ship and a fish.
static friction:
it is the type of friction that exists between the surfaces in contact when there is no relative motion.
dynamic friction:
it is the friction experienced by a body when it is in motion.
sliding friction:
the friction that exists between two surfaces in contact when the body slides on the surfaces is known as the sliding friction.
rolling friction:
the friction that exists between two surfaces when a body rolls on the surface of other is known as rolling friction.
fluid friction:
Fluids also exert friction on bodies moving through it. this friction is called fluid friction for viscous drag. the fluid friction depends on
●shape of the moving body
●velocity of the body
●nature of the fluid