Block A is sliding across a horizontal and frictionless surface when it collides with block B as shown in the figure. Block B is attached to a massless string of length L = 1.0 m and is free to rotate as a pendulum. The speed of block A after the collision is half its speed before the collision. Block B was at rest before the collision. The mass of block A is 7 kg and the mass of block B is 2 kg. What is the minimum initial speed (in m/s) that block A must have for block B to swing through a complete vertical circle? L. Vo A 8.29

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