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Question

Consider the following statements:

Statement 1: Friction is caused due to interlocking of irregularities present on the surfaces in contact.

Statement 2: Rough surfaces generally have more friction between them.

Which of these statement(s) is correct?


A

Neither of the statements is correct.

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B

Both the statements are correct.

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C

Only statement 1 is correct.

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D

Only statement 2 is correct.

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Solution

The correct option is B

Both the statements are correct.


Friction is caused by the interlocking of irregularities present on the surfaces in contact. Rough surfaces have a large number of irregularities and generally have more friction.

This frictional force increases if the two surfaces are pressed harder. Even surfaces which appear smooth have a large number of minute irregularities present on them. These irregularities lock into one another. ​Thus, both the statements are correct.


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