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    Question

    Asinglefixedpulleyisusedtodraw water from a well

    because –
    A efficiency is 100% Correct Answer Incorrect Answer
    B velocity ratio is low Correct Answer Incorrect Answer
    C mechanical advantage is high Correct Answer Incorrect Answer
    D force is applied in a convenient direction Correct Answer Incorrect Answer

    Solution

    Asinglefixedpulleyisusedtolift aloadupwardsbyapplyingeffortsdownward's. The load and effort move equal distance but in opposite directions. This is convenient as to apply effort in downward direction. They are used on flag-poles and to draw water from a well.

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