Question

Lubricants ________. – (a) Increase friction, (b) Reduce friction, (c) Both (a) & (b), (d) None.

Answer 1

Given :-

Lubricants helps to

Options :-

a) Increase the friction

b) Reduce the friction

c) Both

d) None

Answer :-

Option - B

EXPLANATION :-

Lubricants helps to reduce the friction . Friction is responsible when the interlockings are present . These lubricants like oil, grease helps to reduce the interlockings i.e Interlockings are avoided by great extent that means it makes the surface smooth So, the friction is reduced by the application of lubricants.

Know more :-

Ways to reduce the friction:-

• Applying lubricants.
• Polishing the surface.
• Usage of ball bearings.

Disadvantages of friction:-

We need to reduce the friction in some cases and there are many Disadvantages as well advantages .

》 Friction is responsible for overheating and wearing out of parts in machinery.

》 Friction produces heat.

》 We slip down our legs in slippery surfaces.

In these cases we need to reduce the friction these are Disadvantages too .

Note :-

There are many advantages as well Disadvantages of friction