A puck of mass $0.50\ \text{kg}$ moves in a circle of radius $0.80\ \text{m}$ at $2.0\ \text{m/s}$ on a smooth horizontal table. It is held by a light string that runs to the centre of the circle and down through a small hole there. The string is pulled down slowly from below until the radius is $0.40\ \text{m}$, as shown in the figure. Which of the following statements are correct?

Fig. 1: Top view of a smooth table with a small hole at O. A puck of mass 0.50 kg moves on a dashed circle of radius 0.80 m about O at 2.0 m/s along the tangent, tied by a string to the hole. The string passes down through the hole and is pulled slowly from below.