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FRICTION DEPENDS ON- NATURE OF SURFACES IN CONTACTWEIGHT OF BODYSHAPE OF BODY

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The force of friction depends on

1.

2.

Force of friction = μ N

in the simplest case : N = mass * g (acceleration due to gravity)

We assume here that g is a constant. So we do not include it as a factor.

1.

*which are moving against each other. Rough surfaces will face more friction. Smooth surfaces have less friction. This factor is expressed in terms of***type of the combination of the surfaces****coefficient of friction - μ.**2.

**that is experienced by one object due to the other object. This contact force acts normal to the surface area of contact. The normal force may be equal to the weight of the object. Or, it may be equal to a resultant of some forces. It is dependent on the mass of the object too.***The normal (reaction) force*Force of friction = μ N

in the simplest case : N = mass * g (acceleration due to gravity)

We assume here that g is a constant. So we do not include it as a factor.