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Question

Which of the following statements are correct about frictional force?
1. It is a non-contact force.
2. It is a contact force.
3. It opposes the relative motion beteween the surfaces in contact.

A
1 only
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B
2 only
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C
1 and 3 only
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D
2 and 3 only
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Solution

The correct option is D 2 and 3 only
Frictional force is a contact force. It only acts when two objects are in contact.
It opposes the relative motion beteween the surfaces in contact.
Hence, statements 2 and 3 are correct.

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