Question

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

Answer 1

Answer:

Explanation:

By polishing the surface, as polishing makes the surface smooth and friction can be reduced.

Using lubricants such as oil or grease can reduce the friction between the surfaces.

When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings

Answer 2

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There are two types of Friction:

$\Large\bold\color{aqua}◇Static\: Friction:$

Static friction is the force which opposes the initiation of motion of an object on the surface. The magnitude of static frictional force $f_s$ lies between $0≤f_s≤μ_sN$

where,

• $µ_s$ – Coefficient of static friction

• N – Normal force

$\Large\bold\color{aqua}◇Kinetic\: Friction:$

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

where,

$µ_k$ – the coefficient of kinetic friction

N – Normal force exerted by the surface on the object

$\small\bold\color{orange}Methods\: to\: reduce\:friction:$

Friction can be reduced

• By using lubricants

• By using Ball bearings

• By polishing

• By streamlining

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