A ball of mass \( m \) is suspended by a thread of length \( l \). With what minimum velocity ha...

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A ball of mass \( m \) is suspended by a thread of length \( l \). With what minimum velocity has the point of suspension to be shifted in the horizontal direction for the ball to move along the circle about that point? What will be the tension of the thread at the moment it will be passing the horizontal position?
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