Statement 1: If the roughness between two surfaces is increased, friction between them increases.
Statement 2: Frictional force experienced by a heavier body is less compared to a lighter body under the same circumstances.

Statement 1 is true, statement 2 is false

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Statement 1 is false, statement 2 is true

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Both statements are true

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Both statements are false

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Solution

The correct option is A Statement 1 is true, statement 2 is false
When we increase the roughness between two surfaces, their interlocking increases, which in turn increases the friction. Hence, statement 1 is true.

Friction increases with increase in the thrust applied by one surface on another. Hence, friction experienced by a heavier body should be more compared to a lighter body. Therefore statement 2 is false.

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Consider the following statements:

Statement 1: Friction is caused due to interlocking of irregularities present on the surfaces in contact.
Statement 2: Frictional force increases if the two surfaces are pressed harder.

Which of these statements is/are correct?

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A. Increases
B decreases
C remain same
D unpredictable

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Statement 1: If the roughness between two surfaces is increased, friction between them increases. Statement 2: Frictional force experienced by a heavier body is less compared to a lighter body under the same circumstances.

Statement 1: If the roughness between two surfaces is increased, friction between them increases.
Statement 2: Frictional force experienced by a heavier body is less compared to a lighter body under the same circumstances.