Static friction between two surfaces

  • A

    Prevents the relative motion between them

  • B

    Opposite to the direction of motion of them

  • C

    Acts in opposite direction of applied force

  • D

    Both $(a)$ and $(b)$

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  • [KVPY 2017]

A uniform rope lies on a horizontal table so that a part of it hangs over the edge. The rope begins to slide down when the length of the hanging part is $25\%$ of the entire length. The coefficient of friction between the rope and the table is