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How to Decrease Friction

How does lubr...

Question

How does lubrication reduce friction.

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Solution

When lubricant is applied between the moving parts of a machine, a thin layer is formed there and moving surfaces do not directly rub against each other. Interlocking of irregularities is avoided to a great extent and movement becomes smooth. Thus friction is reduced.

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Q. Materials used to reduce friction are called ______(lubricants, beverages).

Q. Can we reduce friction to zero by polishing surfaces or using large amount of lubricants ?

Friction can be reduced to zero by applying lot of lubricants.

Q. Which of the following should be used to reduce friction on a carrom board?
(a) a lubricating oil
(b) a dry lubricant
(c) a layer of grease
(d) a ball bearing

Q. Assertion :In order to reduce sliding friction, lubricants are used. Reason: Lubrication changes the conditions of rubbing, replacing the sliding friction by rolling friction, there by reducing the force of friction.

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