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    Question

    Which of the following statement is correct?

    >I. Friction is caused by the irregularities on the two surfaces in contact II. Friction is a necessary evil
    A Both I and II Correct Answer Incorrect Answer
    B Only II Correct Answer Incorrect Answer
    C Neither I nor II Correct Answer Incorrect Answer
    D Only I Correct Answer Incorrect Answer

    Solution

    Friction is caused by interlocking of irregularities present on the surfaces in contact. Friction is said to be a necessary evil because it is useful as well as harmful. Friction helps us to walk, write, hold things, lift objects.

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