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Block \( A \) is moving away from the wall at a speed \( v \) and acceleration \( a \).
(1) Velocity of \( B \) is \( v \) with respect to \( A \).
(2) Acceleration of \( B \) is a with respect to \( A \).
(3) Acceleration of \( B \) is \( 4 a \) with respect to \( A \).
(4) Acceleration of \( B \) is \( \sqrt{ } 17 a \) with respect to \( A \).
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