End \( A \) of a rod \( A B \) is being pulled on the floor with a constant velocity \( v_{0} \)...

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End \( A \) of a rod \( A B \) is being pulled on the floor with a constant velocity \( v_{0} \) as shown. Taking the length of the rod as \( l \), at an instant when the rod makes an angle \( 37^{\circ} \) with the horizontal, calculate The velocity of end \( B \)
(1) \( \frac{3}{5} v_{0} \)
(2) \( \frac{4}{5} v_{0} \)
(3) \( \frac{5}{3} v_{0} \)
(4) \( \frac{5}{4} v_{0} \)
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