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Question

# 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.

A
Statement 1 is true, statement 2 is false
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B
Statement 1 is false, statement 2 is true
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C
Both statements are true
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D
Both statements are false
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Solution

## The correct option is A Statement 1 is true, statement 2 is falseWhen 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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