Explain various types of friction. Suggest a few methods to reduce fri

1.	Explain various types of friction. Suggest a few methods to reduce friction
Answer» There are two types of Friction: (1) Static Friction: Static friction is the force which opposes the initiation of motion of an object on the surface. The magnitude of static frictional force f lies between 0 ≤ f_s ≤ μ_sN where, µ_s – coefficient of static friction N – Normal force (2) Kinetic friction: The frictional force exerted by the surface when an object slides is called as kinetic friction. Also called as sliding friction or dynamic friction, f_k – µ_k N where µ_k – the coefficient of kinetic friction N – Normal force exerted by the surface on the object Methods to reduce friction: Friction can be reduced By using lubricants By using Ball bearings By polishing By streamlining

Explain various types of friction. Suggest a few methods to reduce friction

Answer»

There are two types of Friction:

(1) Static Friction:

Static friction is the force which opposes the initiation of motion of an object on the surface. The magnitude of static frictional force f lies between

0 ≤ f_s ≤ μ_sN

where, µ_s – coefficient of static friction

N – Normal force

(2) Kinetic friction:

The frictional force exerted by the surface when an object slides is called as kinetic friction. Also called as sliding friction or dynamic friction,

f_k – µ_k N

where µ_k – the coefficient of kinetic friction

N – Normal force exerted by the surface on the object

Methods to reduce friction:

Friction can be reduced

By using lubricants
By using Ball bearings
By polishing By streamlining

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